Arifacts Caused Prior To Processing

Question 1

What causes Film Scratches?

Answer 1

-Caused by abrasive material, fingernails or rough handling

-Emulsion is sensitive to scratches

-Can be identified be reflecting light off the film at an angle

Question 2

What Causes Crimp Marks?

Answer 2

• Caused by bending film abruptly
• If done prior to exposure, white crescent mark
• If done after exposure, dark crescent mark

Question 3

What Causes Pressure Marks?

Answer 3

• Caused by stacking film, dropping heavy specimens on film
• Is a severe localized application of pressure.
• Area affected is less dense than remainder

Question 4

What Causes Static Marks?

Answer 4

• Caused by rough handling or rapid movement
• Also caused by rapid removal from paper or holder
• Appears as a branch-like, jagged dark lines or irregular dark spots

Question 5

What’s Causes Screen Marks?

Answer 5

• Any blemish in lead screen becomes intensified
• Creates significant indications
• Screens must be extremely clean

Question 6

What Causes Fog?

Answer 6

• It is slight overall exposure
• Caused by film being exposed to low levels of radiation.
• Also caused by high humidity or temperature.
• May be caused by safelight above acceptable limits
• Leaving Film between lead screens may also produce fogging

Question 7

What Causes Light Exposure?

Answer 7

• Caused by inadvertent exposure to light
• Film holder could be faulty
• Results in severe overexposure (black streaks or blotches)

Question 8

What Causes Fingermarks

Answer 8

• Caused by chemical or oil on fingers
• Easy to recogize
• May be lighter or darker