[rollei_list] Re: What is Velox? What are lantern slides?
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <rollei_list@xxxxxxxxxxxxx>
- Date: Sun, 20 Aug 2006 07:15:57 -0700
----- Original Message -----
From: "Jeffery Smith" <jls@xxxxxxxxxx>
To: <rollei_list@xxxxxxxxxxxxx>
Sent: Sunday, August 20, 2006 6:43 AM
Subject: [rollei_list] Re: What is Velox? What are lantern
slides?
Lantern slides are the slides that predated 35mm slides. In
short, they are
120 (6x6) slides sandwiched between two pieces of glass. The
older
projectors were long metal things with a nice black wrinkled
paint finish. I
had a medical entomology class from an old geezer at Tulane
University who
had nothing but lantern slides for his lecture. Great
pictures, like a
mosquito control truck towing a chemical spraying device
(and the truck
looked like something Bonnie and Clyde rode in).
Jeffery Smith
New Orleans, LA
http://www.400tx.com
http://400tx.blogspot.com/
Larger. Lantern slides were made in a number of sizes.
The ones I remember from school were about 3-1/4 x 4-1/4.
They were typically glass plates with a cover glass to
protect the emulsion side. B&W slides were coated with an
emulsion similar to slow enlarging paper. The slides were
made by contact or projection printing from negatives. The
lantern slide projectors I remember were made by American
Optical or Bausch & Lomb (Balopticon) but there were other
makes. In principal 35mm slides are lantern slides. The name
comes from the earliest, pre-electric, projectors that used
gas mantle type lanterns for light sources. These were
similar to modern Coleman lanterns, higher power ones burned
Acetylene.
Velox was originally a 'gas-light' contact printing paper
invented by Leo Baekeland, the inventor of Bakelite.
Baekeland sold his patent and company (the Nepara Chemical
Company) to Eastman Kodak, who continued to make Velox paper
although it was changed to a normal developing out paper
with time. Gas-Light paper is paper that is slow enough to
be processed under very subdued room light, that is without
a safelight. The later Velox was Kodak's standard paper for
photofinishers. It came in a very long range of contrast
grades, 6 at one time, and, way back when, in a variety of
surfaces and textures, but most Velox was single weight
glossy. If you have old B&W snapshots the chances are they
are printed on Velox. It has a characteristic Blue-Black
image color. Nepara also made Nepara Solution, an early
print developer somewhat similar to Dektol.
Kodak liked the name Velox and used it for other products
aimed mostly at amateurs. BTW, I also have a book of Velox
retouching dye I picked up somewhere. The dye is in squares
printed on the backing paper.
Good lantern slides are extremely sharp, they make 35mm
slides look mushy.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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