Re: REPLY: FROM NuArc was PPG Starphire Glass ( ?? Questioning My Data)

The thickness of the glass on my NuArc 26-1k is 1/4". The tempered
glass shield is 3/32".

Sandy

>DEAR ERIC,
> I didn't ask thickness but I can measure it when I go to my
>darkroom next
>week.
> CHEERS!
> BOB
>
> Please check my website: http://www.bobkiss.com/
>
>-----Original Message-----
>From: Eric Neilsen [mailto:e.neilsen@worldnet.att.net]
>Sent: Saturday, November 19, 2005 1:57 PM
>To: alt-photo-process-l@sask.usask.ca
>Subject: RE: FROM NuArc was PPG Starphire Glass ( ?? Questioning My Data)
>
>Bob, Did they tell you, or do you know how thick it is?
>
>Eric Neilsen Photography
>4101 Commerce Street
>Suite 9
>Dallas, TX 75226
>http://e.neilsen.home.att.net
>http://ericneilsenphotography.com
>
>> -----Original Message-----
>> From: BOB KISS [mailto:bobkiss@caribsurf.com]
>> Sent: Saturday, November 19, 2005 10:03 AM
>> To: alt-photo-process-l@sask.usask.ca
>> Subject: FROM NuArc was PPG Starphire Glass ( ?? Questioning My Data)
>>
>> DEAR LIST,
>> I don't know if this is useful to anyone but I received a reply to a
>> question I sent to NuArc Tech services. They stated that they use
>> "standard" glass but make sure it is perfect, i.e. no bubbles or ripples
>> in
>> it.
>> CHEERS!
>> BOB
>>
>> Please check my website: http://www.bobkiss.com/
>>
>> -----Original Message-----
>> From: Eric Neilsen [mailto:e.neilsen@worldnet.att.net]
>> Sent: Thursday, November 17, 2005 11:37 PM
>> To: alt-photo-process-l@sask.usask.ca
>> Subject: PPG Starphire Glass ( ?? Questioning My Data)
>>
>> After last nights back and forth, I was indeed going to call PPG.
>>
>> This required all of 3 minutes and a short wait for a return call. I
>> received a call back from Penny Bridges. She has since faxed to me data
>> for
>> both the Starphire glass and SOLARPHIRE glass. The thinnest that the
>> Starphire is listed as being manufactured is 1/8" or 3.3mm and all the way
>> up to 3/4. The data sheets do differ somewhat from those I received in
>> 1992
>> as one would expect; most businesses update their literature. I received
>> separate sheets for 4mm and 8mm and this one combines the information and
>> transmission data in 10nm increments and only shows transmission data for
>> a
>> glass with a thickness of 5.66mm. It does not show up on the available
>> sizes
>> but that is what is referred to in the chart.
>>
>> While it does not match my data, as one would expect from different
>> thickness of glass, it does come darn close to the 4mm data that I have.
>> It
>> is not what I believe to be true as Sandy indicated in his email, but what
>> I
>> know to be true based on the manufactures data. Penny said that they have
>> not changed it since they first starting making it but do offer a coating.
>>
>> It took very me little effort and would certainly have been something that
>> I
>> would have done if I were to include test information about a type glass
>> in
>> a book : ) But wait, that is what I DID back in 1992. It appears in my
>> book
>> on platinum printing. I don't site all the data. But do talk about why and
>> when one might benefit from using it.
>>
>>
>> This data also talks about the infrared quality of the glass. I have not
>> studied gum like I have studied platinum/palladium printing. It may be
>> that
>> Judy's experience with Starphire has something to do with other
>> characteristics of the glass that are not beneficial to the chemistry she
>> used.
>>
>>
>> At this moment, I can't lay my hands on them which does bother me. I took
>> them out of my notes to make copies for some students and can't locate
>> them.
>> I do however, have the data for the 4mm which is what Sandy googled.
>>
>> I will however, be glad to post PDF's of the documents after I receive
>> them
>> in the mail. The faxes are OK, but I'd rather wait at least until I have a
>> chance to print them with my higher quality printer. I am sure she'll fax
>> them to you too Sandy.
>>
>> The PPG web site that I posted last night has their phone number. I
> > suggest
>> calling them.
>>
>>
>>
>>
>> Eric Neilsen Photography
>> 4101 Commerce Street, Suite 9
>> Dallas, TX 75226
>> 214-827-8301
>> http://ericneilsenphotography.com
>>
>>
>>
>>
Received on Sat Nov 19 15:23:44 2005