But what is it called? I looked and didn't find it but didn't know where to look. I looked through the needle point area.
It's called
PLASTIC CANVAS. It's used when people crochet with the different colors of yarn and make things like tissue boxes and whatnot. See here for what it's actually used for:
https://www.google.com/search?q=pla...ved=0ahUKEwiTmqr4mZvMAhWF8j4KHRyWBrQQ_AUIBygC
I have some of the same stuff, only mine is colored black (personal preference). I picked it up at my local Wal-Mart for like $2 for 3 sheets and it was in the artsy section where you would find paint, crayons, colored pencils, yarn, glue, and things of the such. They had quite a few to pick from as far as shape and quantity.
Here is a quick search on Wal-Mart's website:
http://www.walmart.com/search/?query=plastic canvas sheets&cat_id=2637&typeahead=plastic canvas sheet
You may have to filter through all the results to find exactly what you need, or just visit a Wal-Mart (or any crafts store should have it - but keep in mind that a crafts store is probably going to charge you more for it, as that is what they are, a CRAFTS store). I just bought a pack of 3 black plastic canvas sheets, and I cut them to fit what I needed them to fit. They come in white, clear, black (and maybe other colors, but that is what was at my Wal-Mart) and they also come in packs of 3, 5, 6, 7.... Here is a link to the EXACT product that I bought:
http://www.walmart.com/ip/Black-Plastic-Canvas-Sheets-3pk/38587654
The dimensions are 13.5" x 10.5 which is good to suit what I needed it for (hornworm containers and silkworm containers). I just cut it to fit and folded it a bit and sha-bam. Good to go. They come in larger sheets; they come in smaller sheets. They can come as super stiff sheets (for when you are crocheting something that needs to be a little stiff such as a tissue box) or they can come as softer sheets for simpler things. Mine is just the right stiffness as it bends pretty good to go into my worm bins, but it also holds pretty solid for when worms climb all over it.
Works great. Easy to use, and the frass from worms falls right through it. When the worms get bigger, their frass too, will be bigger, and will not go through the holes on the plastic canvas. No worries though: The canvas is PLASTIC and in my experience, nothing ever sticks to it. The frass just rolls down off of when it gets too big to fall through the holes IF you don't have it set up all flat-like. I have my canvas setup in a large plastic bin and I have it shaped like a small upside-down "U" shape instead of elevating it on something so it's flat like most people do. The way I have it, all the food is nearer the top of the container and they have to crawl up the upside-down "U" to get to it. They are now elevated as they eat and the poo just rolls off down the sides as they defecate. You can shape it like this, or you can elevate just one side of it and let the other side rest on the bottom of your bin. I'm sure you can figure it out
I use them for smaller worms, and as the worms get bigger, I switch to gutter guard (
http://www.lowes.com/pd_504913-1410-VX620_1z0uk6y__?productId=50031732&pl=1) as it has much larger holes to allow frass to fall through, as well as allowing the worms to easier access anywhere they want to go by crawling THROUGH the large holes in the mesh instead of crawling AROUND the mesh.
Hope this helps.
