Changes
/* Materials */ Added information regarding where rubber sheets can be bought
# Clean surface with compressed air to remove the rubber dust between passes
# Stick rubber cut part onto a support material for when you want to make a stamp
Marc has bought A4 sheets at 57 CHF sheet, however [http://www.aliexpress.com/item/Scentless-laser-rubber-sheet-for-stampEco-friendly-laser-rubber-sheet-for-stamp/815226364.html here] you can get them for 20$ per single sheet, or for 7$ [http://www.aliexpress.com/item/Scentless-laser-rubber-sheet-for-stampEco-friendly-laser-rubber-sheet-for-stamp/815226364.html here] if you buy in lots of 5.
=== Others ===
