... And, do not use soap. Use a dish washing liquid instead. Ivory is probably a good bet. The only problem with dish washing liquids is that they have a...
8340
Jerry
atc322asd
Apr 5, 2006 2:03 am
Hello Barry and Mark Excuse me for butting in. You wouldn't want to miss this one on the web. Here is the best I've seen. It has a beginners section An...
8341
Bob May
a52chevybob
Apr 5, 2006 3:33 am
That more looks like a set of reflections from the front to back surface of the transparent overcoating of the aluminum. I'd not worry about it myself. The...
8342
talquence
Apr 5, 2006 3:48 am
Mark Excellent point, alkalys are as bad for aluminum as the florine group is for silver. I prefer Polmolive myself but that is because I always have it on...
8343
Richard Schwartz
theoboehm
Apr 5, 2006 4:08 am
You must decide if you want the mirror clean, or if you want the mirror undamaged. A good way to get rid of the dirt would be with #120 carbo, but that would...
8344
Lasse Lindh
swedbird
Apr 5, 2006 7:38 am
Thanks for the response everyone! My mirror is an old Cave, recoated a year ago, so I donīt want to take any chances. But I will try to clean it, first with...
8345
Barry Miller
prairietel
Apr 5, 2006 1:57 pm
Very nice - IMHO. Peter Smith is very thorough....
8346
Wes & Lou
martay6taylor
Apr 5, 2006 3:37 pm
Jerry- Thanks for the excellent referral to this website. I'm a beginner as well- and found it extremely helpful & informative. Will save it for when it's ...
8347
n5kzw
Apr 5, 2006 5:36 pm
Do you have any info one the properties of Kodak Wetting Solution? Regards, Ed...
8348
talquence
Apr 5, 2006 10:34 pm
I just thought of another problem with soap, slightly alkaline. If you have a silocon dioxide overcoat alkalines will dilsolve it. They convert silocon dioxide...
8349
toolontop
Apr 5, 2006 10:43 pm
Hmmm, the way I usually use the Ronchi grating is to examine the progress of figuring by moving the grating through the COC spread of the mirror as it...
8350
Wes & Lou
martay6taylor
Apr 5, 2006 11:20 pm
Hi, Mark- Have been following this thread with interest, as I'm a greenhorn novice. Tried your link, wasn't a good link- just fyi. Will try it again tomorrow, ...
8351
Mark Holm
holmmd17
Apr 6, 2006 12:11 am
... Kodak Photo-Flo is described as a wetting agent. It reduces surface tension between water and film so that the water can be removed by sponge or squeegee...
8352
tony gondola
acgna
Apr 6, 2006 12:54 am
I'm wondering here, given the very low concentrations and short immersion times is any of this of real practical concern? Has anyone actually seen something...
8353
Barry Miller
prairietel
Apr 6, 2006 1:00 am
Actually, if you look click on the link then look at the URL in your browser, you'll notice the URL includes a parenthesis and period at the end. Get rid of...
8354
toolontop
Apr 6, 2006 1:29 am
Oops, the link-demon stuck ). on the end of it. Try http://www.bbastrodesigns.com/tm/ronchi.html Best, Mark...
8355
toolontop
Apr 6, 2006 1:38 am
Hi Barry: Don't worry about that, even though they're a bit pricey you can't bust em and the Edmunds grating /works/ better than any other. In the past I've...
8356
Barry Miller
prairietel
Apr 6, 2006 1:54 am
Thanks Mark, that makes me feel a lot better -but the shipping charge still stings ($10), must be a very high density 1x1 piece of glass -maybe from a black...
8357
Jarvis Krumbein
kpjarvis2003
Apr 6, 2006 4:58 am
Wes, the correct address is http://www.bbastrodesigns.com/tm/ronchi.html Jarvis Krumbein Wes & Lou <martay6@...> wrote: Hi, Mark- Have been...
8358
Wes & Lou
martay6taylor
Apr 6, 2006 9:32 am
It worked- thanks! Wes ... From: atm_free@yahoogroups.com [mailto:atm_free@yahoogroups.com] On Behalf Of toolontop Sent: Wednesday, April 05, 2006 9:30 PM To:...
8359
Mitchell
moonman1867
Apr 6, 2006 8:59 pm
... I will second that and just wanted to add don'y forget to check out the rigs section I wouldn't say use all of the ideas but it can definitly help get you...
8360
Richard Schwartz
theoboehm
Apr 7, 2006 6:09 am
You should never post anything in the ATM list that people will disagree with. I like your ideas on testing, especially because you can tilt the masks 45...
8361
toolontop
Apr 7, 2006 11:32 pm
Of course I agree with this, but I know people will disagree with that, so I can't post a reply. :) It may be useful to add a bit to my comments below on...
8362
Mark Holm
holmmd17
Apr 11, 2006 3:41 am
I remember, on atmlist.net I think it was, a description of inspectors in Chinese factories turning out mirrors for mass market Newtonians using hand held...
8363
Barry Miller
prairietel
Apr 14, 2006 3:34 am
Hi folks, Just got my supplies for grinding an 8" mirror (plate glass). Decided to start by using an 1 1/2" x 2" cast iron bushing for the tool. Was curious...
8364
Mel Bartels
Mel_Bartels
Apr 14, 2006 3:46 am
... I achieve best results when the ring tool is about 1/2 the mirror size. Stroke through the middle with as much pressure as you can bear. Mel Bartels...
8365
Richard Schwartz
theoboehm
Apr 14, 2006 5:44 am
Actually, an 6" aluminum disk works fantastically well for hogging out the approximate curve. Then switch to an 8" aluminum disk for fine grinding. My web...
8366
Barry Miller
prairietel
Apr 14, 2006 3:27 pm
... Thanks Mel, What do you typically use for a ring tool?...
8367
Richard Schwartz
theoboehm
Apr 14, 2006 3:56 pm
Many use a very large pipe flange. Take a tape measure to Home Depot with you, and measure the flange diameter. Six inches is all any man needs. ... From:...
8368
Barry Miller
prairietel
Apr 14, 2006 4:05 pm
... Richard, do you have a URL for that? Thanks, Barry...
