Probleme with toner transfer

Hello , i use the toner transfer methode for my circuits , i use also this methode for the components side to identify the parts .
The problem is when i remove the paper from the board and clean it in water
I notice that there is some remains and splatter of the white glossy paper , look at the photo :



I try to clean it with every product like alcohol , nail polish remover hot water , but Without good result.
Please help me and thanks

Glossy paper (or dedicated photo printing paper) isn't well suited for the purpose, its coating sticks on the PCB. But I believe it won't do any harm. Soaking in water (probably with detergent) for an extended time might soften it though.

Worst case, some white pigments are migrating into the FR4 resin surface.

OK , what kind of paper is better ??

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A bit of paper stuck on the PCB will not interfere with the etch process. Nail polish remover (acetone) will remove both the toner (the black print) and the paper. In fact you can bake the board after the paper has been removed so that the toner fuses and sticks well to the board. You can use silicone coated paper for this purpose (baking paper).

c_mitra said:

A bit of paper stuck on the PCB will not interfere with the etch process. Nail polish remover (acetone) will remove both the toner (the black print) and the paper. In fact you can bake the board after the paper has been removed so that the toner fuses and sticks well to the board. You can use silicone coated paper for this purpose (baking paper).

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Thanka , but when can i found this paper it is easy to get it ???

I use toner transfer regularly. Luckily there's a printing press next door and I have a wide choice of paper types. The one I generally use is somewhat thinner than copier paper, glossy on one side and matte on the other. I don't know what it's called but it's not photo paper.

After the ironing, I soak it in water. Rubbing on some dish cleaning soap helps penetration. Then I rub off the paper with my thumb under a trickle of water - not too roughly and not too gently. After most of the paper is gone, there's still a fuzz of the fiber sticking out at the sides of the tracks ( not visible when wet). The fuzz does interfere with quick and neat etching, so I scrub off as much of it as possible with a toothbrush - again not too vigorously.

As someone else pointed out, your problem is with the paper coating. With the paper I use, I routinely use 20 mil (0.5 mm) tracks and occasionally do less than 10 mil, but I try to avoid anything thinner than 15 mil. That's for circuit tracks. For text and markings, 10 mil is not difficult.

I have got good results with tracing paper (smooth, translucent paper, often called vellum) - my major problem has been to get a thick and uniform coating of the toner in the first place! But as the other poster above mentioned it is not at all difficult to get 20-25 mils lines. I often do the silk screen on the component side (when the board is only single side) and it looks nice.