Re: Lightsource for Gum Bichromates
Hi Kees, The tubes I use (TL'K 40W) are indeed 40W, and they're definitely 60cm long and their diameter is definitely 38mm. I built the exposure unit myself (pretty much as you describe) so I'm pretty sure about the specs. The store I purchased them also was stocking the 20W version but I opted for the considerably more powerful 40W version. Bjorn, the average exposure time for my gum prints is between 3 - 5 minutes per layer (w/ 5% ammonium dichromate) -> far from being awfully long ;) You're comparing apples to oranges I think... (The 125W you mention is for Photoflood type lightsource I guess - right?) Regards, Loris. 25 Temmuz 2008, Cuma, 11:02 am tarihinde, Kees Brandenburg yazmış: > Hello Bjørn and others, > > Loris is right on the wavelenght but not on the 40W. The 60cm 05 > tubes are 20W and 38mm diameter, at least mine are. That fits them > nicely in cheap harwarestore 60cm 20W fittings. > > Here's the (old) pdf with product information: > http://polychrome.nl/file_download/18/ > 9nice printing unit > > If you skrew 8 to 10 cheap 60cm 20W fittings, the shallowest you can > get, close together on a piece of plywood you get a 50x60 UV unit. > Attach plywood back and sides of about 20 cm height for a self > standing UV unit . You can slide your printing frame under it from the > front. > > The Philips 05 is now discontinued, the 03 still exists but is a 40W > 60cm. There is a new series for (repro)graphic use. > This one (Actinic BL TL 20W/10 SLV) could be a replacement for the > 05: http://tinyurl.com/5trwnm > There's also the Blacklight Blue (TL 20W BLB SLV): > http://tinyurl.com/666hdq > > kees > > > > > On 25 jul 2008, at 08:00, Loris Medici wrote: > >> Erich, something must be wrong (either on my part, or yours), since >> the >> technical specs I got from Philips Turkey indicates that the peak is >> around 360 - 365 nm., and therefore making the /05 series perfect >> for most >> alt processes. >> >> Regards, >> Loris. >> >> >> 24 Temmuz 2008, PerÅ�embe, 9:38 pm tarihinde, Erich Camerling >> yazmıÅ�: >>> >>> Bjørn, >>> Look in the archive. >>> Date: 20th of March 2002,Re:Light source for big prints. >>> correction:color 03 peak is 365 nm >>> color 05 peak is 420 nm >>> lenght must be length >>> addition :peak CLEO is 350 nm >>> >>> Erich Camerling >>> >>> >>>> ----- Original Message ----- From: Bjørn Frostad >>>> To: alt-photo-process-l@usask.ca >>>> Sent: Wednesday, July 23, 2008 4:23 PM >>>> Subject: Lightsource for Gum Bichromates >>>> >>>> >>>> Since the Phillips HPR 125 apparently has been discontinued, I'll >>>> have >>>> to go for the next best alternative for making my gum-prints. >>>> But - ....I can't seem to find it........ >>>> Any ideas? >>>> >>>> >>>> Bjørn Frostad, Norway >>>> >>>> >>>> >>>> __________ NOD32 3296 (20080724) Information __________ >>>> >>>> Diese E-Mail wurde vom NOD32 antivirus system geprüft >>>> http://www.nod32.com >>>> >>>> >>>> >>> >>> >>> >> >> > >
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