I understand these are for blending but exactly how do you use these? Do you need one for each color (been using them on pastels)? Why the different sizes? Do they peel? because it looks like you can peel these.
Yes these are used for blending. You are supposed to use the side rather than the tip as it will get blunt. You can use tortillions (the ones that unwind) and if the tip flattens stick an opened up paperclip in from the other end and push it back out. But they are never quite the same. Also, you can use stumps, the ones that don't unwind, the same way. If you flatten the top of one of these you will always have a flat tip.
You definitely want a different one for each color unless you want some of the pigment from the last blending to get in with the new pigment you are blending. Sometimes this works great though, and I think it would work especially well with Pastels. I always keep the dirty ones, especially with graphite, for when I just want to add a little bit of tone to a picture I am working on. Works great for shading clouds and such. I have been know if mine get dirty enough to rub them on a piece of sand paper and wear off some of the graphite. This roughens the end a little also and makes for another texture entirely when I am blending.
Hope this helps!
I had those same questions. Thanks Christina for asking and Marsha for answering!
I use thes for blending Graphite and coloured pencils I Do not have one for each colour I clean them bu using a putty rubber after all they are just made of paper.