Cricut, and I buy these 40 precut 12x12 sheets from Amazon, I haven’t had a problem with bleeding.
Limited-time deal: Permanent Adhesive Backed Vinyl Sheets by EZ Craft USA - 12” x 12” - 40 Sheets Assorted Colors Works with Cricut and Other Cutters https://www.amazon.com/dp/B01HEB3UNQ/ref=cm_sw_r_cp_api_glt_fabc_dl_WXRDS1FDCM5M7VFK69N4?_encoding=UTF8&psc=1
I get these from Amazon,
Limited-time deal: Permanent Adhesive Backed Vinyl Sheets by EZ Craft USA - 12" x 12" - 40 Sheets Assorted Colors Works with Cricut and Other Cutters https://www.amazon.com/dp/B01HEB3UNQ/ref=cm_sw_r_cp_api_glt_i_dl_BJBBQMQJEFT96Z94PN0H?_encoding=UTF8&psc=1