Method of making families of steady-state heat transfer coefficient curves visible by photochemical means
AssigneeSiemens Aktiengesellschaft
InventorsBernhard Montag, Heinrich Optiz
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Abstract
For making families of steady-state heat transfer coefficient curves visible, the invisible residual moisture profile obtained by exposing a moisture photogelatin layer to a gas is immersed, in daylight, in a soluble organic sulfur compound, particularly thioacetamide, and is converted into a silver sulfide line photogram. The method is used, for example, for making visible families of steady-state heat transfer coefficient curves on forced air-cooled electronic assemblies.
Claims3
In a method for making families of steady-state heat transfer coefficient curves visible by photochemical means, wherein, a moist silver halide-containing photogelatin layer is applied to a surface and subjected to a gas stream, whereby an invisible residual moisture profile is obtained in said photogelatin layer, the improvement comprising converting said residual moisture profile into a silver sulfide line photogram by immersing said photogelatin layer, in daylight, in a developer solution mixture comprising alcohol and an organic sulfur compound soluble in alcohol and capable of reacting with the silver halide to form a silver sulfide, and thereafter fixing the line photogram.
Dependencies are inferred from the claim text.