Q & A
- What is the color chart for?
- The color chart is used as reference for the original color saturation of the negative on Telecine or color timer.
- What is the grey chart for?
- Use lab densitometer to measure grey card exposure on negative in order to understand if the negative is underexposed or overexposed.
- How to shoot the grey card in proper way?
- When testing or shooting, use a form to record T-stop. If you choose T5.6 to be your standard exposure, overexpose 1/3T, 2/3T, 1T and underexpose 1/3T, 2/3T, 1T in total of seven T-stop. Then use lab densitometer to measure grey card exposure on negative to determine which is your exposure standard. Notice: Please use the normal film to test negative density; do not use short end or expired film stock. With this kind of test, your exposure data will be meaningful and accurate.
- How do you keep your negatives?
- Do not place your film close to the heat. For example, trunk of the car, the car without air-condition in summer heat, bright light, scorching sun, x-ray.
Do not place your film onto the damp floor or ground.
Do not place your film in the freezer. If you take it out from the fringe, please put it in room temperature for 12 hours before shooting.
- What is PUSH processing and PULL processing?
- Pull processing film decreases the speed of the processed film. It is achieved by developing the film for a shorter time, and/or at a lower temperature.
By push processing film, the film can be exposed at a higher exposure index (EI) than the manufacturer's indicated film speed, allowing the film to be used under lighting conditions that would ordinarily be too low for good exposures.
However, push processing comes at the cost of decreased quality: artifacts such as higher contrast, lower resolution, distorted colors, increased grain, etc. are often visible on film that has been push processed.
- What is Bleach By-Pass?
- It' s a lab technique, which entails either the partial or complete skipping of the bleaching function during the processing of a color film. By doing this, the silver is retained in the emulsion along with the color dyes. The result is a black and white or grey image over a color image, with increased contrast and decreased color saturation. This procedure can be used in original negative or print, also on the inter-positive and inter-negative.
- What is Digital Intermediate?
- Digital Intermediate describes the process of digitizing a motion picture shot on traditional film and manipulating color and other image characteristics to change the look, and is usually the final creative adjustment to a movie before distribution in theaters.
- What is DQI (Dolby Quality Index)?
- Soundtrack Quality =〔（4*Error Rating Average) + Corners Found Average + Bit Clarity Average + Crossweb Average + Digital Crossmod + Lateral Pos Average + Vertical Pos Average / 10
DQI is the average value of above soundtrack quality, update every ten seconds.
