Gelatin and polyester colour filters

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Description

The well-known Wratten gelatin filters, an industry standard for many years, are now being replaced by 'Wratten 2' filters. They are manufactured in polyester and are much more robust, but essentially to the same spectral standard.

We are introducing them as they become available, distinguishing them from the original catalogue number by changing the letter pairs from WY and WB to KY and KB respectively.

We also offer a low-cost range of polyester filters (CY) which are rough equivalents of the Wratten range.

Specification

Dimensions	75 x 75 x 0.1mm
Transmittance	see curves below

Note: Wavelength listed in table is transition wavelength (T=50%) for long-pass and peak for band-pass types. Data and curves are based on Wratten data.

gelatin filter curves

More...

Item code	Material	Type	Wratten No	Wavelength (nm)	Description	Price per item (£ GBP)	Select amount
794 KY 75	Wratten 2 polyester	Long-pass	87	794	Black filters passing IR from the stated wavelength to 2.7µm	£114.95
581 CY 75	Economy polyester	Long-pass	23A	581	Orange-red	TBA	Send us a stock query
540 CY 75	Economy polyester	Long-pass	16	540	Yellow-orange	TBA	Send us a stock query
528 CY 75	Economy polyester	Long-pass	15	528	Deep yellow	TBA	Send us a stock query
519 CY 75	Economy polyester	Long-pass	12	519	Deep yellow (minus blue)	£13.79
494 CY 75	Economy polyester	Long-pass	8	494	Yellow	TBA	Send us a stock query
411 CY 75	Economy polyester	Long-pass	2B	411	Pale yellow UV-absorbing	TBA	Send us a stock query
395 CY 75	Economy polyester	Long-pass	1A	395	Pale pink UV-absorbing (skylight)	TBA	Send us a stock query
440 KB 75	Wratten 2 polyester	Band-pass	47	440	Tricolour blue	TBA	Send us a stock query
527 KB 75	Wratten 2 polyester	Band-pass	58	527	Tricolour green	TBA	Send us a stock query
432 CB 75	Economy polyester	Band-pass	47B	432	Narrow-cut tricolour blue	TBA	Send us a stock query
600 CY 75	Economy polyester	Long-pass	25	600	Tricolour red	TBA	Send us a stock query
794 CY 75	Economy polyester	Long-pass	87	794	Black filters passing IR from the stated wavelength to 2.7µm	TBA	Send us a stock query
540 KY 75	Wratten 2 polyester	Long-pass	16	540	Yellow-orange	TBA	Send us a stock query
575 WB 75	Wratten gelatin	Band-pass	90	575	Dark amber monochromat	TBA	Send us a stock query
547 WB 75	Wratten gelatin	Band-pass	99	547	Dark green	£52.03
525 WB 75	Wratten gelatin	Band-pass	61	525	Narrow-cut tricolour green	£114.95
516 WB 75	Wratten gelatin	Band-pass	11	516	Yellowish green	£52.03
440 WB 75	Wratten gelatin	Band-pass	47	440	Tricolour blue	TBA	Send us a stock query
852 WY 75	Wratten gelatin	Long-pass	87C	852	[replaced by 852 KY 75]	TBA	Send us a stock query
528 WY 75	Wratten gelatin	Long-pass	15	528	Deep yellow	£52.03
494 WY 75	Wratten gelatin	Long-pass	8	494	[replaced by 494 KY 75]	£52.03
411 WY 75	Wratten gelatin	Long-pass	2B	411	Pale yellow UV-absorbing	£52.03
516 CB 75	Economy polyester	Band-pass	11	516	Yellowish green	TBA	Send us a stock query

For more information regarding stock availability icons, please see our shipping page.