Heathkit ET-3400 red filter material?

[Dwight K. Elvey]

>From: "James Fogg" <James at jdfogg.com>
>
>> As I restore this ET-3400, I am curious if anyone knows what 
>> kind of filter material Heathkit provided that sticks to the 
>> TIL312 7-segment displays?  Mine have 4 of 6 displays 
>> covered, and 2 displays bare.  It seems to be some sort of 
>> adhesive red tape or film, but I have no idea what to use for 
>> a modern substitute.
>> 
>> Thanks for any tips.
>
>Two ideas come to mind - lighting gels, used in stage lighting, and
>Kodak makes lens filter gels in a huge range of colors. Both these items
>will appear to be colored sheets of plastic. In the case of the Kodak
>product, the "pass band" of the filter will be narrow and precise (an
>exact shade of a certain color and it won't pass much else).
>
>

Hi
 One might try an auto parts store. The often have some
tape to cover broken tail lights.
Dwight