AIEL MARKET
                               Purchase Guide

                             Colour Media Table


      Type              Advantages                Disadvantages
 _______________     _______________          ___________________
|
| Gelatin             Good Colour Range.         Water Soluble.
|
|                     Cheap.                     Fades Easily.
|
|                     Reasonable Strength        Can't Stand
|                      During First Usages.       High Heat.
|
|                                                Becomes Brittle and
|                                                 Tears Easily after
|                                                  Long-Term Exposure
|                                                   to Heat.


 _______________     _______________          ___________________
|
| Acetate             Good Colour Range.         Buckles and Becomes Brittle
|                                                 After High Temperatures,
|                     Strong.                      or from Long-Term
|                                                   Exposure to Heat.
|                     Waterproof.
|
|                     Some Fade Resistance.
|
|                     Endures Temperatures
|                      to 100 C.
|
|                     Reasonable Cost.


      Type              Advantages                Disadvantages
 _______________     _______________          ___________________
|
| Polyester           Widest Colour Range.       Higher Initial Cost
|                                                 Compared to Gelatin
|                     Waterproof.                  and Acetate.
|
|                     Strong.                    (May be able to be
|                                                 Recouped over the
|                     Fade Resistant.             Life of the Gel.)
|
|                     Endures Temperatures
|                      to 200 C.


 _______________     _______________          ___________________
|
| Polycarbonate       Wide Colour Range.         Highest Initial Cost
|                                                 of the Plastic Gels.
|                     Strong.
|                                                (May be able to be
|                     Waterproof.                 Recouped over the
|                                                 Life of the Gel.)
|                     Very Fade Resistant.
|                                                 Crinkles Somewhat
|                     Endures Temperatures         after Exposure to
|                      to 400 C.                    High Temperatures.
|
|                                                 Eventually Becomes
|                                                  Brittle after Long-Term
|                                                   High Heat Exposure, but
|                                                    Remains Fairly Robust
|
|						  Can Darken Considerably
						   after Long-Term Usage
						    under High Heat.


      Type              Advantages                Disadvantages
 _______________     _______________          ___________________
|
| Glass               Waterproof.                Expensive.
|
|                     Extremely Fade             Fragile.
|                      Resistant.
|                                                Limited Sizes.
|                     Withstands High
|                      Temperatures.             Limited Colours
|                                                 (Unless Combined).


 _______________     _______________          ___________________
|
| Glass               Waterproof.                Very Expensive.
|  (Dichroic)
|                     Extremely Fade             Fragile.
|                      Resistant.
|                                                Limited Sizes.
|                     Withstands High
|                      Temperatures.             Limited Colours
|                                                 Unless Combined).
|                     Very Pure Colour.


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Reference:

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