The Rosco Cinegel range includes over 75 tools for controlling light. Since it's introduction in 1970, Cinegel has continually developed and grown to meet the working needs of the lighting professional. 
Here are some tools and data that will be of interest to you.

• Filter Facts - A handbook on using Rosco filters for 
                            controlling light.
• Diffusion      -12 popular diffusions.
• The Atkins Report  -Comparison report on colour        correction by a Gaffer.
• Kelvin Calculator -Tool to determine what filters to use.
• Equivalent Charts - Lee to Rosco filters