The "Specialist" Lantern Slide Binder.
We are frequently asked for particulars of the best methods for colouring lantern sildes, and for those who wish to do this work we should recommend the Japanese method with soluble aniline colours. The Japanese were, we think, the first to show the possibilities of obtaining artistically coloured slides by this method, and suitable tints are now regularly sold by English firms specially for the work. We may mention the photo tints of Messrs. Johnson, which cost 1/6 per box of 9 colours ready for immedate. use ; and the books of colours sold by Messrs. Kodak for the same purpose, price 1/-. In preparing a slide for tinting the warm brown tone is not suitable, and we should suggest one of the good brands of plates for black tones, such as the Ilford Special Lantern Plate.
An excellent developer is the following : TINTED LANTERN SLIDES.
Citric acid ..........
Potass bromide ........
Caustic soda (stick)
Water to ..........
For use take 1 oz. A, 1 oz. B, and water 2 ounces.
The plate after development should be fixed as usual, washed and passed through the formalin bath to thoroughly harden the film. The plate is now ready for colouring, which is done by washing on the colours with a soft brush, gradually blending one tint into the other.
Slides having been made from the most desirable negatives illustrating the year's work, they may be arranged in the form of a lecture, and any missing slides to give continuity may be purchased. Now, when making up a lecture, it is well to bann the guide book style, and when we say this we do not mean that the lecture should not be informative. But it must be borne in mind that an ounce of personal experience is worth any amount of copy from books. Remembering this we shall not fail to tell our hearers something that will interest them, for the personal note appeals to all. Generally speaking, a lantern lecture should not last much more than an hour, and the matter should be arranged to run consecutively with the slides, so that there are no gaps of silence. For signalling to the lanternist a silent electric signal should be used, for nothing is more distracting to an audience than knocking on the floor with a stick.
ON LANTERN LECTURES.
It is often necessary to project title or notices at the beginning or end of lectures, and for this purpose special plates can be purchased with either transparent or black surfaces. The black ones show white lines when scratched with a pin or needle, while those that are transparent may be written on with a pen and Indian ink. Numerous forms of boxes have been designed for holding lantern slides and those without grooves are preferable, particularly if we wish to economise space. For home use a lantern-slide cabinet is a very desirable acquisition, for the various sets may be kept in labelled drawers and a special box used for taking a set out for showing purposes.
As for the effectual showing of the slides, the best form of lantern illuminant, etc., these will be found in the next chapter.
NOTICE PLATES FOR LECTURES.
STORING LANTERN SLIDES.
R. Lincoln Cocks.
Reproduction of oil print from negative taken with the Sinclair " Una" Camera.