Pugaboo Posted June 12, 2015 Report Share Posted June 12, 2015 I have searched here and watched the Tim See video and haven't found which type of plaster to use. He just says plaster but not what type in his video. Would Plaster of Paris work for the magic box or do I need to use pottery plaster? T Link to comment Share on other sites More sharing options...
oldlady Posted June 12, 2015 Report Share Posted June 12, 2015 it would work for this purpose. pottery plaster assumes you are going to make a mold which will get a lot of usage and handling. just putting things in and taking them out of the damp box is not going to hurt ordinary plaster. the only problem i see is the availability of ordinary plaster of paris. the paint store sells it in only small amounts. hope it is enough. ( of course, having 50 lbs of plaster sitting around when you only need a couple of sizes of damp box could be a problem, too.) Link to comment Share on other sites More sharing options...
jrgpots Posted June 12, 2015 Report Share Posted June 12, 2015 I used all pupose plaster of paris in my box. No problems so far. My box is 32x19.5 13.75 deep. It is a "Sterilite" 105 Qt container with snap lid. I put 1.5" of plaster in the base. It worked well for slab building. Jed Link to comment Share on other sites More sharing options...
Celia UK Posted June 12, 2015 Report Share Posted June 12, 2015 I've used plaster of Paris & no1 potters' plaster depending on what was available. Both worked. One of my boxes seems damper than the others but I can't remember which is which now! Oh how I love my damp boxes - I have slabs, hand moulded leaves & flowers, thrown bowls I'm thinking about re decoration.. All just waiting for when I get back to them. Celia Link to comment Share on other sites More sharing options...
Pugaboo Posted June 12, 2015 Author Report Share Posted June 12, 2015 Thank you everyone! Plaster of Paris it is since I can get that locally and would have to pay for shipping on the pottery plaster. I am only going to need small damp boxes to start anyway. I have a large order of mugs and am throwing a lot more than I am used to doing each day. I want to prep a bunch of handles and put them in damp boxes so I can more easily assemble the mugs at the best time to do so. I also want to see if they will work for storing the tops and bottoms for my small boxes so I can make a bunch of those and then use them as needed. Now back to the studio... T Link to comment Share on other sites More sharing options...
JohnnyK Posted June 12, 2015 Report Share Posted June 12, 2015 I used pottery plaster in my box when I put it together about 2 years ago and added about a quart of water after the plaster set up. As an experiment, I placed 2 mug bodies and a large sycamore leaf in the box and closed the lid. I looked in on my pieces after about a year and the mugs were as moist and pliable as the day I threw them and the leaf was moist too. I am in the process of converting a small studio apartment into my clay studio and the box was moved to the studio to get it out of my garage. At the 18 month point and occasionally since then I've checked on my pieces to find them in the same pliable condition. I got rid of the leaf because it was getting moldy. Since I started the experiment, I've added only another pint of water to maintain the humidity level. My box is about 30x15x15 and has about 1.5" of plaster in it. The studio has a shower which I was going to convert into a wet closet, but after working with the box, I think I might just put some shelves in it and stack some damp boxes instead. Link to comment Share on other sites More sharing options...
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