Showing posts with label preservation. Show all posts
Showing posts with label preservation. Show all posts

Monday, August 17, 2009

Object History

Unfortunately, we don't have extensive records on many of our objects. Sometimes we don't know if an object was donated to us in a broken state, or if it broke in our care (over the nearly 40 years a museum in some form has existed). So it was really exciting for me to find a contact print documenting the repair of a broken object.
Object History

I presume this occurred in the 1970s, when there was a great deal of activity in the collections. You can see that the ceramic figure was in (at least) two pieces, broken right down the middle.
Object History

Presumably, an adhesive was applied to the broken edges, and then it was held together. By what look like rubber bands. And then it is all one piece again!
Object History

And the repair has held through all the years. You can still see the crack running down the center of the figure.
Object History

I've got a large box full of negatives to go through. I wonder what other object stories we'll uncover as we work through those.

Thursday, August 6, 2009

Tyvek Shelf Cover project

Our compactor storage is awesome. In addition to the compactor storage, we have a couple shelves of storage for oversize materials.
Tyvek shelf cover project

The shelves do their job well, but the objects on them are exposed to light and dust... especially light. A number of the shields have quite fragile pigments. So I wanted to devise some way to construct covers for the shelves. I considered many options, but eventually decided to use the Tyvek, which is a great material for museum use because it's light, waterproof, and pretty archival. Plus, I happened to have a roll of it 60" wide.
Tyvek shelf cover project

Except the shelves are 76.5" wide. Which meant that I had to bring in the big guns. Or, rather, the Mini Ultra Sewing Machine.
Tyvek shelf cover project

Now, I hadn't used a sewing machine in about four years, but I was pleased to find that I was still able to fill a bobbin and thread the machine. And, after some experimentation on scraps, I was also please to find that the Tyvek sews pretty nicely and doesn't rip easily.
Tyvek shelf cover project

The covers for the front of the shelf are quite large. In addition to being over 6 feet long, the shelves are 8 feet tall. In order to make such a large amount of material sewable, I did what any resourceful person would. I used paper clips to keep everything lined up.
Tyvek shelf cover project

The paper clips worked remarkably well. And so did the little sewing machine.
Tyvek shelf cover project

By the end of all that I had several large pieces of Tyvek and then had to work out how to attach the Tyvek to the shelves. I've seen velcro used with great success, but decided against the velcro because it would make adjusting the shelves difficult in the future and would probably leave a sticky residue on the metal if it was ever removed. Ultimately I decided to use simple magnets. The magnets hold up the Tyvek effectively, but are also easy to adjust, rearrange, and remove. It's almost too simple!

The end product of the the project is shelves which are protected from light and dust. I'm pleased with the result.
Tyvek shelf cover project

Tyvek shelf cover project

Tuesday, March 31, 2009

Done!

It is done.

The collections move, that is. We completed the move between March 21 and March 25th. It took maybe 3 days all told. I didn't take many photos; I was too busy lifting lots and lots of boxes. But here's how it went down:

First, we identified which boxes we were going to pack. Then we checked them off of the master box list and loaded them into the van.
Collections Move
Then I drove very carefully to the new location, backing up to the museum loading dock. Believe you me, I got pretty darn good at backing up the full sized van we used. We then unloaded the boxes onto tables in the workroom. We would do a couple of loads of boxes before the tables were full and ready for the next step.
Collections Move
From the tables, the boxes were transferred to shelves in the compactor unit, based on what they contained. Both the master box list and the packing list on the outside of each box indicated where the box should go. As we placed each box on a shelf, we marked the shelf on the master box list. And pretty soon, we had moved a lot of boxes.
Collections Move
There were a few objects which were too large to pack in boxes. These objects were moved individually and placed on shelves - no need to unpack what hasn't been packed!
Collections Move
And, finally, after all the boxes that could go in the compactors were put in the compactors, we moved the oversized boxes into the storage room, where they are still hanging out today.
Collections Move
So far, nothing has been unpacked. There are four reasons for this: 1) after the move was completed, I hied it out of here for an extended weekend and some rest, 2) I've had to unpack all the supplies, files, and miscellany from the old office and workspace into the new office and workspace, 3) we're going to need to cut many many shelf liners for some of the objects to rest on (the liners provide a surface with more friction than the metal shelves), and, most importantly, 4) the objects in the boxes are now in a much different environment than they have been for the past decade or more and need time to adjust to their surrounding. The cardboard box provides a bit of a buffer to the environmental change, allowing a slower adjustment rather than shock treatment. Think of the difference between easing yourself into a cool swimming pool and diving in.

But we'll be unpacking soon enough. As soon as the chaos in the office is cleared up...

Wednesday, December 3, 2008

Seeing the unseen

If you've been reading this blog for a while, I think you've come to understand that I am very particular about how objects are stored and supported. You've seen the bulky white foam and the specialized cardboard supports. But what about when objects are in galleries? They aren't (usually) encased in cardboard and foam. But, I assure you, we collections managers and conservators are still very particular about how objects are supported, even when on view.

The National Museums Liverpool blog has a nice post about exhibit supports and an even nicer flickr photo set of the process. Even though I work behind the scenes, I still love to see behind the scenes at other places. Enjoy!

Thursday, November 20, 2008

Tips and Techniques Thursday: Support for Objects with Round Bottoms

So much for succinct blog post titles, eh? In the spirit of weekly features which may or may not be posted every week, I present to you Tips and Techniques Thursday. As museum activity accelerates (we move at the end of March), we're working to stabilize objects prior to packing.

Bucket support project

This week I worked on housing two buckets with rounded bottoms. The rounded bottoms mean that they can wobble as they sit on the shelf, potentially impacting other objects, but also putting pressure on a limited number of areas on the bottom. Meaning that some parts of the bottom could become more worn than others. So what to do about it?

You will need:
-A foam knife
-A safe cutting surface
-A hot glue gun and glue sticks
-Foam tri rod

Step one: Using an appropriate length of tri-rod foam, cut several triangle insets a couple of inches apart. Form into a ring to see if more cut insets are necessary.
Bucket support project

Step two: Using the hot glue gun, form the rod into a ring and glue the ends together. Hold the ends together for half a minute or so; the rod wants to return to a straight form, so holding it is important.
Bucket support project

Step three: If there is glue extruding at the join, trim it off or cover it with a piece of tyvek. Set object on ring.
Bucket support project

Now the pressure is evenly distributed along the bottom edge of the bucket, and it is less likely to wobble and impact other objects. I borrowed this method from the National Museum of the American Indian.

Friday, May 16, 2008

Environmental Monitoring

Summer is coming! At least it is according to the Weather Underground.
5.16.2008 weather

It still looks a bit like spring outside.
5.16.2008 blooms

Okay, but what does this wonderful turn in the weather have to do with collections management, since that's why we're all here? Well, let me tell you! So the point of collections management is to maintain and protect collections from deterioration. One thing which causes the deterioration of collections is environmental conditions. That is, things stored at the wrong temperature or at the wrong relative humidity can deteriorate faster - just imagine what would happen if you stored your books in the bathroom, with all that water in the air. They'd wrinkle and crease, and maybe start growing mold. So you can see why it's important to keep an eye on the environmental conditions.

Our storerooms have dial thermohygrometers which indicate both the temperature and the relative humidity.
thermohygrometer

When we move to the new building, I will be using a very popular digital device called a datalogger which will perform the same function, but at a high degree of accuracy and consistency (I'll admit, sometimes I miss a day here and there, not to mention weekends.)

And to keep track of changes, I take down the reading every weekday morning. In this way I can keep track of trends over time.
monitoring sheets

It's not rocket science, it's not even fancy, but from these readings, I can generate excel charts showing the change over time, like this one from last October for relative humidity:
Relative humidity

You'll see on that chart a relatively sudden drop in relative humidity(RH) - in about 2 days it drops 15%. That means the air got a lot drier pretty quickly. When changes happen suddenly like that it can put a lot of stress on sensitive objects, causing cracks, pieces falling off, and invisible damage that will accumulate over time.

This subject is of special interest right now because this week I saw a jump of about 15% in RH in a couple of days. I also found a document in the files from the 1970s, when the building the collections are in now was being built. It indicated that the entire building was environmentally controlled and would have a building wide RH of 45-55% (a standard 'normal' setting). But my tracking has shown that this environmental control has faltered somewhat over the years - RH in one storeroom spent much of the winter under 20%.

So what does this all mean? It means that our storage rooms have less than optimal environmental conditions. What can I do about this? Not a whole lot, really. I can monitor it, be aware that this may cause condition problems for some of our objects, and make plans to improve things in the future.

And I can spend some time in the sun this summery weekend, enjoying the natural environmental conditions.

Wednesday, April 9, 2008

These boots were made for walking....

but now they're in a museum so no one is allowed to use them for walking, running, dancing, or even hanging out on the couch watching tv. And they're not boots, really, they're moccasins.

Over the past couple weeks I spent some time rehousing the moccasin collection. We have 17.5 pairs of moccasins, ranging from so tiny that they must be for a doll to mens sizes, and 1 pair of child's mukluks. Some of them were pretty much flat after being in storage for years (you know how a light canvas sneaker flops over? It's kind of like that. Shoes don't always hold their shape.), while others had some paper stuffing which gave them some support.
Original stuffing.
None had storage which allowed easy lifting while minimizing physical contact. So, taking a page from the Minnestoa Historical Society (which has really excellent information on their website, by the way), I set out to make custom supports for the moccasins, both internal and external.

I started with the moccasins, like this one. It had no internal support, although the large amount of beading held the shape of the foot fairly effectively.
Pre-stuffing

Then I looked at what I had on hand: Cotton stockinette fabric, polyester quilt batting, scissors, and a sewing kit. The scissors, by the way, are distressingly dull. Must remember to sharpen those sometime.
Materials

For my first try, I made a rectangular pillow:
Experiment one: Rectangles

Okay, so it was approximately rectangular. I'm a collections manager, not a seamstress. But look how nicely it supports the back of the moccasin:
Stuffed form

But, it occurred to me, feet are not rectangular. So the rest of the moccasin support inserts were made to be roughly foot shaped. Again, I emphasize roughly.
Experiment 2:  Vaguely foot shaped ovals

And check out the sole of the shoe above. Looks like it was recycled from a parfleche, or some other similarly decorated object.

And finally, after sewing 33 supports, all the moccasins were supported. I endeavored to recreate the external support which the MHS had utilized, and, ultimately, I think it worked out pretty well. Ours are made of acid free card board with a tissue paper layer on which the moccasins sit (because the cardboard is buffered and the tissue paper is not).
Top view

Top view

Side view

The freshly housed moccasins were returned to their wooden drawers where they will patiently await the move to a new facility.
Drawer storage

Ultimately, this kind of storage will reduce the need for handling the moccasins which will help preserve them for a longer time. Feels like a happy ending to me!

Friday, February 8, 2008

A tale of two housings

The museum has been very lucky to have three dedicated interns this quarter. One of the interns, Rachel, has been working on our collection of arrows, bows, and similar things. She's taken some well intentioned custom housing and transformed it into modern, safe, and really lovely housing.

This is the original state of the arrows (click to see larger versions):

Old arrow housing

The arrow stand had short pieces of plastic tubing which held up the arrows. The tubing was originally clear, but is now yellowed. When we took the arrows out of the tubing, we found it was often difficult to do so while not scraping the tubing against the shafts and to do so while properly supporting the entire shaft. It seemed clear that continued use of the old arrow stand would not suffice.

Rachel first did some research and catalogued the arrows. Our records indicate that these arrows are from the Barama River region in Guyana. We think that they were used in fishing. They seem to resemble spears, but have feathers and a nock so look to be used with a bow. The tips are made of wood, not rusted metal, as it might appear at first glance. In short, these are really cool looking objects.

After much planning, discussion, and work, Rachel has created custom housing for the arrows which is much much better.

New housing

We had no boxes long enough, and even our plain cardboard was too short to use, so Rachel had to MacGyver a solution out of what we did have. The box is made of two different boxes, cut and glued together. The supports are ethafoam with cotton tape ties. The boxes are thrifty and effective!

Ties close up

And don't those arrows look excellent!

Points

I'd call that a job well done.

Tuesday, January 29, 2008

A Broken Bottle

Yesterday and this morning I've been constructing storage for one of the most fragile objects in the collection. Not only is this object fragile, it's actually broken. It's a brown glass bottle, enclosed by basketry and was probably made by an individual in the Makah tribe. Problem is, at some point in the past, the glass bottle broke. The basketry is still completely in place, but when moved you can hear the glass shards clattering into each other within the basket. (click on any of the photos below to see larger versions)

Broken Bottle

My first step was to make a box that the bottle could be isolated in. The box has ties on the sides which means that the sides drop down, making it easier to get the bottle out for research.

Broken Bottle with box

But just setting the bottle inside the box isn't going to stop it from tipping over and breaking further, so I made two Tyvek pillows. These pillows are filled with polyester quilt batting and sewn shut. The pillows are then attached to opposite sides of the box with velcro.

Broken Bottle with pillows and box

Then I closed up the box, tied the sides, and, viola!, the bottle is immobilized but it is not subject to too much undue pressure. The pillows can also compensate for any shifting that may occur within the body of the object.

Final Housing

This housing should help to mitigate further damage to the object and help to support it as well. It's a beautiful object, so I'm pleased that this box is a success.

I looked around the internet, and if you'd like to see similar basketry bottles, check out the Ethnology Collection at the Burke Museum, which is available to look at online.

Monday, December 3, 2007

Winter Answers

Well, it snowed and snowed and snowed this weekend. Then suddenly it warmed up and has been raining since, so the snow is much reduced as I type this.

And *ding ding ding* we have a winner! Larissa was right on to this past week's mystery object. It is a sled runner. My information tells me that it is whale bone and has been broken since at least 1998.

This sled runner is one of the many objects I've been rehousing to prepare for the move. This is how the runner is being stored.



The pieces are tied with cotton twill to a piece of cardboard lined with foam. The board has handled to facilitate lifting. This board fits into a large drawer. When it comes time to move, the empty space in the drawer with be filled with quilt batting (separated from the object by a layer of tyvek or tissue paper) and the drawers can be stacked. In this way, the objects won't shift and move around when they're loaded into a vehicle. And the materials used in the tray are such that the sled runner can stay on the tray for a long time without suffering negatively.

Wednesday, November 14, 2007

Contaminated Collections

Pesticide residues are a big problem in museum collections. Particularly pesticide residues which remain tenacious over a long period of time - like arsenic.

Back in the day, it was common practice for museums and collectors to "poison" their collections - dipping them in some kind of chemical bath - to keep away the bugs, the rodents, and all manner of creepy crawlies which might eat the organic material in, say, a basket, a mask, or leather objects. It was recommended by the Smithsonian. This was wildly effective - there are many many beautifully preserved objects. To this day student museologists hear tales of small historical societies with volunteers who keep their cache of old pesticides on hand to treat incoming collections. The downside to the practice of poisoning collections is that the poisons which kill the creepy crawlies also tend to have detrimental health effects for humans as well.

This means that, unless museums have absolutely perfect records of the object from the time it was made through to the present day, we need to assume that an object is contaminated. Like this basket.



As I went to make a condition report of this basket, I noticed a white residue. Not exactly crystalline, but grainy and visible to the eye. Arsenic sometimes has this property over time (although I am not a chemist, nor do I play one on TV). But I wasn't taking any chances. I was already wearing my nitrile gloves (although not the brand linked to - we buy powder free gloves), because I am aware that pesticides are a likely issue in the collection. I began wearing a mask when handling this basket as well.

So I have a basket that I think might be contaminated with arsenic. What does it mean? It means that most of the collection is probably contaminated, as it has been moved over the years. But the nature of the residue made me feel that it might be removed by brushing or jostling. I do not wish that, because then there would be free floating contaminants. So I created a custom enclosed box which will help to isolate this basket and any poisonous residues which might be on it. I place a warning on the exterior box so that others are aware of the possible issues with this object.

Now, it's entirely possible that this is not pesticide residue. Maybe the white grains are some sort of paint splatter or old mold growth that looks unfamiliar to me. But I prefer to follow the old adage, better safe than sorry, and be careful.

The National Museum of the American Indian has a very good page of links on this topic, if you would like to know more.

Monday, November 5, 2007

A Mystery Revealed

Last Friday's Whatzit was nigh impossible. It was a closed box with only the dimensions to guide you.

The consensus of the guesses was that it might be footwear (moccasins, knit socks, Jimmy Hoffa's loafers), but that it could be anything. Not footwear, folks.

They're masks!




From the collection of a former art professor on this campus, this is a pair of Nootka masks. Our documentation shows that there were originally three masks, but the third has not been located for approximately three decades.



These wooden masks are some of the first to be rehoused in anticipation of our future collections move. The custom box is built to fit within a standard bankers box. A layer of foam topped by quilt batting could be laid in the box to prevent shifting during the moving process. The masks sit on custom made pillows sewn from Tyvek and stuffed with polyester quilt batting. The pillows support the masks and keep them from resting exclusively on their edges - this distributes pressure.

Additionally, the boxes create a microenvironment which buffers the masks from the changes in temperature and relatively humidity in our storage areas.

Wednesday, October 24, 2007

Still More Rocking, Still Less Rolling

Can you guess what these are?



Boxes on a cart? Yep! Boxes filled with.... rocks! Specifically projectile points and chipped stone tools.



All those boxes on that cart, yes all of them, are chipped stone pieces from a donation the museum received in the 1950s. The catalog cards read something like "Cigar box of arrowpoints, 200 in box. Found at campsites along the Columbia River." And there are many cards like that. At some point the "arrowpoints" were removed from the boxes they were donated in and put in these white cardboard boxes; I would guess it happened in the mid to late 1970s. And they've been sitting in them since then.

From time to time, people have worked with this collection of chipped stone, recording information about each object, placing it in a bag, and writing a unique object number on the bag. But the objects still remained in these boxes.



I find it difficult to locate things in the boxes, even the ones which have been previously worked over and individually bagged. In light of this, I have asked one of my intrepid volunteers to help me organize these lithics so that they are accessible. And also so we are able to evaluate if the 200 in the cigar box still number 200, or if some have been misplaced over the years. This project will also allow us to bag the loose objects for consistency. Additionally, the individual bags will protect the points from the kind of damage possible in the older storage (ie, a bunch of them in a box). A further benefit is that this project makes the objects more accessible to any researchers interested in working with this unprovenienced collection of lithics.



In the end, this arrangement will be more accessible, better organized, more easily assessed, and will save space.