Dan Daniel Subscriber Joined Jul 4, 2009 Messages 2,883 Location upstate New York Format Medium Format Nov 15, 2024 #1 Anyone know what kind of lens cement Kodak was using in the late 1940s? I have a doublet with some minor separation and might use it as learner for recementing. But I'll need to get it apart first. Thanks.
Anyone know what kind of lens cement Kodak was using in the late 1940s? I have a doublet with some minor separation and might use it as learner for recementing. But I'll need to get it apart first. Thanks.
Donald Qualls Subscriber Joined Jan 19, 2005 Messages 12,295 Location North Carolina Format Multi Format Nov 15, 2024 #2 Almost certainly Canada Balsam. Epoxy was pretty new stuff that long ago (invented in the 1930s and amber colored at that time). You should be able to free the elements with carefully applied heat and/or a solvent like xylene (read the label warnings, liver damage is bad).
Almost certainly Canada Balsam. Epoxy was pretty new stuff that long ago (invented in the 1930s and amber colored at that time). You should be able to free the elements with carefully applied heat and/or a solvent like xylene (read the label warnings, liver damage is bad).
Ian Grant Subscriber Joined Aug 2, 2004 Messages 23,263 Location West Midland Format Multi Format Nov 15, 2024 #3 Definitely balsam. Ian
xkaes Subscriber Joined Mar 25, 2006 Messages 4,791 Location Colorado Format Multi Format Nov 15, 2024 #4 If you have hair dryer, you can use it to try to loosen it up and get them apart.
cowanw Member Joined Aug 29, 2006 Messages 2,235 Location Hamilton, On Format Large Format Nov 15, 2024 #5 Paint Stripper with Methylene Chloride works well- outside, drop it in a closed glass jar for two weeks.
Paint Stripper with Methylene Chloride works well- outside, drop it in a closed glass jar for two weeks.
campy51 Subscriber Joined Oct 16, 2014 Messages 1,215 Location Boston area USA Format Multi Format Nov 15, 2024 #6 In water on stove at low setting worked for me when I tried to see if I could separate a lens. Don't boil.
In water on stove at low setting worked for me when I tried to see if I could separate a lens. Don't boil.
OAPOli Member Joined Sep 26, 2022 Messages 684 Location Toronto Format Medium Format Nov 15, 2024 #7 Acetone in a jar for a couple weeks will also do the job.