Re: [photo-3d] RBT Mounts and film curl

["David W. Kesner" <drdave@xxxxxxxxxx>]

Don Parks writes:

> Has anyone noticed a difference between Kodak and Fuji
> slide films that effects slide mounting in RBT mounts or
> using the RBT jig method for mounting to Spicer mounts?

I have used Kodak Ektachrome in most of its consumer forms 
(Elite, Elite II, Select, etc.) as well as Fuji Sensia, Sensia 
II, and Velvia. I have only used ProviaF in 120 form. Yes, 
there is a difference between the films. However, I have not 
had any consistent problem using the RBT jig method with any 
of the films.

I have a local lab process my film (dip and dunk method) and I 
pick it up the same day. It is never rolled and is returned in 
an acetate sleeves. I take it home and hang it up until I 
mount - which is hardly ever more than a few days and usually 
the same or next day. Occasionally I get a roll with cupping 
(I refer end to end as curling and top to bottom as cupping) 
but it has happened with all the types of film I have used. I 
also occasionally get chips that are loose on the pin bars, 
but once again this happens with all film types. If it is 
consistent, then I simply replace the pin bar. No offense to 
RBT, but there is some manufacturing tolerance to the pin bars 
so try several until you find one that is "tight". I have 
found the 1.0 and 2.0 grey bars to be a much "tighter" fit in 
the channel than the 0.5 white bars that most people use.

I am surprised to hear that so many people are having 
problems. It seems that curling and cupping are the main 
culprit. I know that humidity plays a roll in this, but Don 
lives just down the street so I assume we have similar 
atmospheric conditions.

Don - where are you getting you film processed? The next time 
you have this problem let me know and I will take a look (if 
you want).

That's all for now,

David W. Kesner
Boise, Idaho, USA
drdave@xxxxxxxxxx