At 01:08 PM 5/21/99 +1000, you wrote: >What sort of track width were you able to get down to? Did you have to use a lot of pressure with the iron to get the toner to stick? I'm interested in using this method but I've tried one brand of paper with very poor results > I've gotten line widths in the neighborhood of .015" You need to experiment with temperature, time and pressure and make sure the board is clean first and cold before you try to remove the paper. Soaking the board and paper in water after it is cool tends to help ease separation of the paper from the toner. Different toners have different melting points so iron temp needs to match your toner's melting point so that it fuses properly to the board. Also the board has to come up to the toners fusing temperature before you remove the heat. Both with the Avery label release paper and the commercial paper you probably won't have perfect success the first few times. There is a firm that offers a modified laminating machine for about $300 which offers much more control than the iron and presumably would increase your success but I haven't tried it so I can't specifically recommend it. See: http://www.dynaart.com/E.DTF2.html -Dan >Regards >Stuart > >D. F. Welch wrote: > >> For those who like to try new things. >> >> I tried the toner release paper mentioned by Roger >> and although it worked reasonably well after I >> got the ironing temperature and technique down I >> was a bit bothered by the cost. >> >> Recently I tried the backing sheet for Avery >> Laser Printer Labels and guess what ... it >> worked, IMHO, as well as the blue stuff and >> was much cheaper. >> >> At 09:00 AM 5/20/99 -0400, you wrote: >> >>>> >> >> X-Mozilla-Status2: 00000000 >> Message-ID: >> Date: Wed, 19 May 1999 10:15:15 -0400 >> From: Roger Morella >> X-Mailer: Mozilla 4.51 [en] (Win98; I) >> X-Accept-Language: en >> MIME-Version: 1.0 >> To: Lawrence Lile >> Subject: [OT] Best PC Board Etching Resist Method (was: hp7475 PC board plotting) >> References: >> Content-Type: multipart/alternative; >> boundary="------------BA21757E20F19C42E4C043A0" >> >> If you have a laser printer and want a quick and easy etching resist method, contact Techniks, Inc. in Ringoes, NJ. www.techniks.com (908-788-8249) >> >> We have been using their PnP-Blue Pres and Peal iron on printed circuit board transfer film for a couple of years and have have found it to be the best method so far (and we have tried a lot of methods ) This is an iron on method where you print the board to their transfer film and iron the film onto the surface of the PC board using an ordinary household iron (if your wife won't let you use 'her' iron you can buy one at the local thrift store for about $5). The result is 2 layers of resist. The film layer and the toner layer. The combination provides a very high degree of resist which will work very well with fine traces and small holes. The hardest part of the whole process is cleaning the toner off the board after it has been etched (which confirms the integrity of the toner as an etchant resist). >> >> They can be reached at www.techniks.com or call them at 908-788-8249 >> >> The price we paid was $30 for 20 sheets of 8 1/2 by 11 An excellent deal considering the time and frustration we have saved. >> >> Roger Morella >> >> <<<< >> >> Daniel F. Welch >> >> Director >> Research and Development >> American Scientific Associates >> Email: amersci@flash.net > >