Don Foreman wrote:
On Sat, 22 Apr 2006 18:30:15 -0400, Jeff Wisnia
wrote:


Bernard Arnest wrote:

Hi,
I'm nearly done a simple angle jig. The final step is to mark off
the angles. One part is SST, the other plain carbon.

I may be able to get access to a laser cutter to etch in the marks,
but easier still might be to take a tiny endmill (I have one) or even
just a center-drill and, with an indexing head on a mill, preceed to
etch in all 360 tick marks.

However, while this will leave permanent tick marks, they'll vanish
from sight if light isn't bouncing off the right way.

Should I just paint in some enamel, maybe even a sharpie marker?
What do you recommend?



-Bernard Arnest


Could you etch the 360 marks? Consider making a CAD or hand drawing of
them and using a photocopy machine to copy it onto the "resist paper"
that folks who make jewelry decorated with etched patterns use.


What resist paper does she use, Jeff? Is that the stuff where toner
is transferred by ironing it on with a hot iron?


Yes, that's the stuff. She uses the "Press-N-Peel" material which comes
in 8-1/2" X 11" sheets and uses a regular household laundry iron to
transfer the resist with.

The stuff seems to be used a lot for making prototype one off printed
circuit boards, but artists and jewelry making types have been using it too.

http://www.techniks.com/retail.htm


There's a woman who works for us who makes jewelry as a hobbby and she's
shown me some quite delicate and detailed patterns she's etched onto
silver that way.

I don't know the chemistry of what you'd use to etch steel and/or
stainless steel, and whether there are photocopyable resist papers which
are compatible with those etchants, but it might be interesting to learn.

Maybody somebody here knows already?

Jeff


--
Jeffry Wisnia

(W1BSV + Brass Rat '57 EE)

"Truth exists; only falsehood has to be invented."