Chilly

Have you tried using spacers between each sheet?

Do you need to fire to ^10? As stated in other threads, ^10 is usually for gas/reduction. You might get just as good results at ^6 if firing electric.

Also, roll out onto cloth. It's much easier to peel the cloth from the clay than any other surface. Can't peel a wooden board from the clay if it sticks.

Ugh indeed. Low fire slip is 1/2 to 1/3 the cost of high-fire, so if they've come from a "paint-your-own" place they're highly likely low-fire.

Doesn't seem to be possible. If you have it stored on a website of your own, you can link to it using the chain tool

Snow? Can't imagine living with snow. Just been on hols in middle England, wore a dress and sandals every day, and for evening walk to the local pub/restaurant for dinner.

If you can sort them into two sections, you can high-fire one from each section by putting them on a cookie (saucer shaped). Document shape/size/section. If you can't sort them, low fire them all. Next time, get them fired separately, or carefully document the shape/size/clay type.

I have those if you need to borrow them.......

I'm thinking it was only ^04. Haven't used them for a while, but it was mainly for bits for christmas mobiles, so wouldn't have needed to be be fired any higher.

Can you change the title of this post please. It will help with searching in future.

Buy a bucket of the cheapest slip you can find. Dust out a mould, apply mould straps/bands. Fill to the brim with slip. Set a timer for 5 minutes. Top up with slip, reset timer for another 5 minutes. Repeat once more. Pour slip out of mould back into container, leave inverted for 1 hour. Stand right way up. Leave until you can see the clay start to shrink away from the edge, all the way round. Undo straps. Lay on side with mould seam horizontal. Gently prise top half away from bottom half of mould. Hold a piece of sponge/folded towel covered with thin cloth in one hand. Tip bottom half of mould onto hand and catch clay model. This next part is the most important. Examine the casting to see how good it is. Moulds have a life of only 20 to 30 casts, as some ingredient in the slip eats the plaster. If the cast is good, try with the rest of them, then find somewhere to fire/sell them. Welcome to the rabbit hole called pottery.

And fill the cavity with something, sponges, crumpled towels, anything to help support the clay, so it doesn't try to collapse. Unless it is very dry, of course.

I read somewhere that you can up to one third dried slip to new slip. I allow it to dry thoroughly, then bash it (dust mask) and add it to a very small amount of water, just enough to cover - tall narrow vessel rather than wide. Then add back to the slip. I often make slip by drying clay and adding water and a couple of stops of sodium dispex.

Low fired, unglazed clay will do this. I have (commercial) red terracotta plant pots, and they change colour quite quickly when they are damp. They leach out salts, from the clay, soil and water, they grow moulds. Can't imagine any way round this at low-fire temperatures.

Try getting hold of a Stoke-on -Trent telephone directory. Even then, I think lots our-source to China now.