Powder Image Formation Utilizing Photo-sensitivity of Amorphous Sulfur

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  • NAKAYAMA Takao
    Imaging Science & Engineering Laboratory, Tokyo Institute of Technology
  • NOSE Taiji
    Imaging Science & Engineering Laboratory, Tokyo Institute of Technology
  • KOKADO Hiroshi
    Imaging Science & Engineering Laboratory, Tokyo Institute of Technology
  • INOUE Eiichi
    Imaging Science & Engineering Laboratory, Tokyo Institute of Technology

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Other Title
  • 感光性非晶質硫黄を用いる粉体画像の形成
  • カンコウセイ ヒショウシツ イオウ オ モチイル フンタイ ガゾウ ノ ケイセイ

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Description

It has been presented in previous papers that the adhesive power between amorphous sulfur and the powder is changed by photopolymerization of cyclo-octa sulfur. In addition, the photopolymerization reaction was spectrally sensitized with Michler's thioketone (4, 4'-tetramethyldiamino thiobenzophenone).<BR>Based on the above facts, new photo-imaging systems using amorphous sulfur layer are designed.<BR>System A) Image exposure on the sulfur layer → washed off the unexposed sulfur by a organic solvent → development by powder → fixing by heat<BR>System B) Image exposure on the sulfur layer → contacting the sulfur layer onto the transfer sheet and heating for transfer of the unexposed sulfur → powder development for both sheets → fixing by heat<BR>System C) Image exposure on the sulfur layer → powder development → fixing by heat<BR>System D) Image exposure → dipping into toluene solution of sulfur to aggregate the sulfur from the solution onto the unexposed area (formation of light scattering image)→ powder development → fixing by heat<BR>In this paper, details of these imaging systems and the behavior of powder development will be described.

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