Search found 57 matches

by Colin Kaminski
Thu Jan 26, 2023 2:33 am
Forum: holoforum administration
Topic: security issue
Replies: 3
Views: 7030

Re: security issue

I received a notice saying that the transfer is complete. It should be better now.

Colin
by Colin Kaminski
Mon Feb 08, 2021 10:54 pm
Forum: holoforum administration
Topic: URL status
Replies: 6
Views: 5773

Re: URL status

It wouldn’t let me transfer it because it was expired. I renewed it. I will sort how to transfer it later. Thank you!
by Colin Kaminski
Mon Feb 08, 2021 1:21 pm
Forum: holoforum administration
Topic: URL status
Replies: 6
Views: 5773

Re: URL status

I don’t remember how to do the transfer.
by Colin Kaminski
Wed Jan 06, 2021 10:43 pm
Forum: holoforum administration
Topic: URL status
Replies: 6
Views: 5773

Re: URL status

Holographyforum.org is up for renewal. Would you like for me to transfer ownership to you?
by Colin Kaminski
Wed Jan 06, 2021 3:32 am
Forum: holoforum administration
Topic: URL status
Replies: 6
Views: 5773

URL status

Hi John,

Is holographyforum.org even used any more?

Cheers!
Colin
by Colin Kaminski
Tue Jun 06, 2017 1:17 am
Forum: AgX
Topic: Jeff Blyth's New Ag Coating Process
Replies: 8
Views: 10833

Re: Jeff Blyth's New Ag Coating Process

I was sent this question and as I have no experience I thought I would post it here: Hopefully you can help me with a problem im having with Mr. Jeff's method. I'm trying his DIY method for red lasers. I got everything in the list but the issue i'm having is that my gelatin solution gets very hard a...
by Colin Kaminski
Thu Oct 20, 2016 4:29 pm
Forum: General Holography
Topic: Isolation Table materials
Replies: 6
Views: 4144

Re: Isolation Table materials

How heavy will the table be?
by Colin Kaminski
Thu Apr 28, 2016 11:09 pm
Forum: AgX
Topic: Jeff Blyth's New Ag Coating Process
Replies: 8
Views: 10833

Jeff Blyth's New Ag Coating Process

This is for home made plates with chemicals available to residential addresses from the Internet. This version is only green sensitive but we could do a group buy on the red sensitizer.

http://d-i-yscience.blogspot.co.uk/2016 ... s.html?m=1
by Colin Kaminski
Mon Apr 11, 2016 10:19 am
Forum: General Holography
Topic: cheap recording spectrometers?
Replies: 7
Views: 3990

Re: cheap recording spectrometers?

You might be lucky to have a solar astronomer near you with a spectrograph. You can make very fine measurements but the instrument is costly. If you have a nice diffraction grating handy you can make one and calibrate it on a sodium vapor lamp (street light). http://www.skyandtelescope.com/get-invol...
by Colin Kaminski
Mon Apr 11, 2016 10:14 am
Forum: General Holography
Topic: molar concentrations
Replies: 5
Views: 3050

Re: molar concentrations

mEqs are very useful for water chemistry. I have to use them all the time. I often have to calculate resulting pH from adding organic acids to water. The pKs are such that there are buffer pHs to overcome.