ITEM NAME:20X A4 Sheets Heat Toner Transfer Paper For DIY PCB Electronic Prototype Mak Z a.imagelink a:hover.imagelink {color:#db3606;.20PCS x A4 Heat Toner Transfer Paper For PCB Electronic Prototype Top quality. The process of making iron tools used in heating or over-presses. 4 Finally, remove the circuit board using toner. 1 circuit board with a laser printer to print to the circuit diagram of the smooth thermal transfer paper.