Emulsion exposure - E.D.C.G.

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Emulsion exposure

Exposure times for conventional emulsions using positive films.
Exposure times with a 5000 watts (5 KW) power lamp at 100cm distance, after manual application of emulsion for different number of layers, on white and yellow mesh.

Emulsion
Color before sensitizing
Viscosity
Layers
Exposure Times (seconds)
On the 120-34W white mesh
On the 120-34Y yellow mesh
1010
Light Violet
Medium
2/2
25
55
1711
Violet
High
2/3
50
75
1970
Blue
Low
2/3
50
80
1915 WR
Light Violet
Low
2/3
70
105
1845
Blue
Very high
-
-
-
1860
Green
Medium
2/3
20
40
1850
Grey-Blue
Low
2/3
12
25
Correction Factors:

Depending on the lamp type:
  • 1kW – 5 x time for 5 Kw lamp
  • 2kW – 2.5 x time for 5 Kw lamp
  • 3kW – 1.7 x time for 5 Kw lamp
  • 4kW – 1.25 x time for 5 Kw lamp
Depending on the number of applied layers:
If the number of layers applied it is different from the table:

  • De la: 1/1 la 1/2    + 33%
  • De la: 1/1 la 2/2    + 50%
  • De la: 1/1 la 2/3    + 100%
  • De la: 1/2 la 2/2    + 25%
  • De la: 1/2 la 1/1    - 33%
  • De la: 2/3 la 2/2    - 25%
  • De la: 2/3 la 1/2    - 33%
Depending on mesh density
  • 140..........- 10%
  • 165..........- 15%
  • 180..........- 25%
  • 90..........+ 20%
  • 77..........+ 60%
  • 43..........+ 100%
  • 32..........+ 150%
Depending on the distance:
  • 60 cm..........0,36
  • 80 cm..........0.64
  • 90 cm..........0.81
  • 110 cm..........1.21
  • 120 cm..........1.44
  • 150 cm..........2.25
  • 180 cm..........3.24
  • 200 cm..........4
  • 250 cm..........6.25
The values in the table are just a starting point for finding the right time. For adequate exposure time, exposure in steps is indicated.
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