I don't know who recommended EDDING 404 markers but
I must say thank you for the suggestion.
The EDDING 404 most definitely can draw SOIC pads and do toner transfer repairs.
So I would conclude that EDDING 404 is by far my first choice for an acid resist pen now.
I always grab some stray pens..and this time a crayon... to check for acid resistance.
BIC INTENSITY FINE
and
LA PEN
both just washed right off the copper.
Crayon barely worked.... and crudded up the acid bath.
after toner transfer:
http://www.learnmorsecode.com/pic/line/IMG_5153.JPG
after etch:
http://www.learnmorsecode.com/pic/line/IMG_5154.JPG
shiny copper traces:
http://www.learnmorsecode.com/pic/line/IMG_5156a.JPG
http://www.learnmorsecode.com/pic/line/index.html
The EDDING 404 most definitely can draw SOIC pads and do toner transfer repairs.
So I would conclude that EDDING 404 is by far my first choice for an acid resist pen now.
I always grab some stray pens..and this time a crayon... to check for acid resistance.
BIC INTENSITY FINE
and
LA PEN
both just washed right off the copper.
Crayon barely worked.... and crudded up the acid bath.
after toner transfer:
http://www.learnmorsecode.com/pic/line/IMG_5153.JPG
after etch:
http://www.learnmorsecode.com/pic/line/IMG_5154.JPG
shiny copper traces:
http://www.learnmorsecode.com/pic/line/IMG_5156a.JPG
http://www.learnmorsecode.com/pic/line/index.html