Hi,
I am trying to make PCBs using the Toner Transfer Method with cloth
Iron. About a month back, I took afew Laser Printouts of the layouts
and on the same day I made use of one of the printouts and made a PCB
and it was a great success.
Now, yesterday, i.e. about a month after I took the printouts, I took
them off the cover and cut out another of the layouts and tried to
make a PCB and it was a disaster. The edges got registered into the
copperclad but the center portion never registered and air got trapped
in the middle. I scratched off all the toner, cleaned the board very
well and then tried again with another printout I had from my month
old printouts and it was again a disaster. After about six takes, all
my printouts got exhausted.
I cannot find any reason why it should fail. The surface was clean and
the heat applied was okay. Could it be that the toner got stuck on the
paper very well since it is one month since I took it? I have never
read anywhere that the PCBs should be made ∗right after∗ taking
printouts. Should it be the case? I am anyway going to try a fresh
printout (I do not have a printer at my disposal, have to go and take
it at a shop afew kilometers away) tomorrow.
Thanks
--
Ramakrishnan - VU3RDD
http://www.zerobeat.in