Harman Direct Positive Paper Safelight Test
Harman Direct Positive Paper Test With Yellow Filter
Harman Direct Positive Paper Test
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Harman Direct Positive Paper Safelight Test
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Harman Direct Positive Paper Safelight Test

These test strips were made by preflashing the paper to a point that was just short of exhibiting a tone (to overcome the papers inertia & increase sensitivity). I then placed a coin on the strips and left them for various times at various distances from my two safe-lights. The top two images were 2 minutes at 1 foot (which is asking for trouble). The two lower images were 4 feet away for 30 seconds. Worryingly all four show an image of the coin. The images on the left are with a Patterson Red 'safe' light, those on the right are with a photax dome type A (red).
Click to expand...
Location
Darkroom
Equipment Used
Photax Patterson safe lights
Exposure
2 mins and 30 seconds
Film & Developer
NA
Paper & Developer
Harman Direct Positive paper and Ilford Multigrade
Lens Filter
NA
i think i'm missing something here but isn't positive paper meant to have some red sensitivity?
 
Perry Way
el wacho said:
i think i'm missing something here but isn't positive paper meant to have some red sensitivity?
Click to expand...

logically it seems you're right. i was wondering the same thing.
 
The paper is orthochromatic - sensitive to every colour except red. The fact sheet says you can use a deep red safe-light. Well, it does mean DEEP red. My darkroom lights are red (rather than amber or brown) and I've used them with ortho sensitised materials before, but they're obviously not safe for this paper. It needs a deep ruby red, like a wratten 29, or maybe even a 92 (darker still).
 

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