Nikon 8700 slave flash question

[momosgarage]

I know this isn't the right forum, but I know people here are both knowledgeable and friendly. I have a question about slave flashes for use with my nikon 8700. Here is what I posted elswhere on the net any suggestions would be helpful:

I have a nikon 8700 and a couple of slave triggers (plus 2 vivitar 283's. I don't want to buy a IR transmitter or a SB series flash for it. I was told that I could use developed slide film as a way to block visable light (from the 8700 pop up flash) and still trigger the slave flashes. I am sure it will work, but I threw away all my ruined slides, my question is will negative film work also or something else?

If there is nothing else I can find some slide film, I just wanted to try it today. Thanks, by the way my favorite cheap RF is the Minolta 7SII

[Brian Sweeney]

Do you have any old remote controls sitting around? How about the little black/red windows over the IR transmitters in them. Break them out and make a mask to fit over the Slave's Sensor.

Also: a Kodak Wratten 88 filter would work; but chances are few people have them...

LET ME KNOW IF IT WORKS!