For the tool that slits card stock, try your local craft store and look in the scrapbooking section, Stores like Michaels, Archivers, AC Moore have huge sections for scrapbookers. They carry small hand punches that will cut slits etc. Look for a corner punch that will cut a slit.
I did a google search and looked at every cardboard seller on the first 10 pages with no luck! There is a type of cardboard that is only white on one side and is single walled, it is sometimes used as poster backing. The problem is I have no idea what it's called. I like the card stock idea but I would need to find a place that sells large sheets in bulk as to save money. I guess I will call around because I cannot find it online. Thank you for the replies!
I did a google search and looked at every cardboard seller on the first 10 pages with no luck! There is a type of cardboard that is only white on one side and is single walled, it is sometimes used as poster backing. The problem is I have no idea what it's called. I like the card stock idea but I would need to find a place that sells large sheets in bulk as to save money. I guess I will call around because I cannot find it online. Thank you for the replies!
Here you go on Uline...
8.5 x 11" x .022 White Chipboard Pad
Thank you, that is a good find! However, they only offer 8.5" X 11" sheets in white. Also, chipboard and cardboard are not the same. But I would use chipboard if I could find white in a lager sheet.