Another technical question;

I'm gonna try pretty soon a couple of blue screen effects. I know that I can buy an expensive paint made especialy for this purpose, but I was wondering if some of you has tried to use normal flat blue paint. Does it worked? What was the color used? etc. What I must check out most while shooting?

Thanks in advance!

If you really want to do blue (or green) screens right, here are the standard colors.

Pantone color system green:
354 C

CMYK green
C:100 M:0 Y:85 K:0

Pantone blue:
Proc. Blue C

CMYK blue:
C:100 M:0 Y:0 K:0

You can usually get these colors from any paint mixing place. Just put down a couple flat coats, and have good lighting and it'll work just fine

But Home Depot or Lowe's or some such, should sell some blue/green paper that's actually set to the correct hue/shade/tone/whatever. The one roll of the stuff I saw was about fifteen feet wide and a few yards long. I just imagine it'd be cheaper than paint. The color you should look for should be called chromakey blue or green.

Lighting is going to be way more important than the exact shade of color used.

As long as the paint is solid and vivid, the shade of green or blue doens't matter so much. You can use any cheap, flat paint from HomeDepot, Lowes, whatever. If you have a chroma sample, they'll even mix a matching color for you and you'll save $30-$40 a gallon.
I used $13 of blue plastic table cloth for my bluescreen and it works great.

Lighting, however, is critical. You've gotta make sure the screen is lit evenly and that there is as little shadow (preferablely none) as possible from your subjects. You're best off using one set of lights for the screen and a completely separate set for your subjects.

This VideoUniversity article might help, too.

Have fun!

here's what you do. get a cheap craft store. get a mom who can sew. and some friends. this is what i did when i went to find my green screen. You go to the craft store and push the old people into some fabric.....or just go with ur friends and pull all the green and blue fabric u can. The take out ur camcorderd and film urself in front of each one while ur friends hold up the fabric. go home and play around and find which one works. then go buy the fabric that works. have ur mom sew it the way you want and walla. you have it. then make sure that she folds the bottoms and sews it so u can stick a pipe in there. Regular price 1.34 at menards. easy cheap and the great thing is u work indoors were u can play with the lighting. i find the garage to be great.