White card to calibrate white balance?


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Deadpoet

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Oct 18, 2004
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#4
ShutterBugL said:
I meant white card actually. : )

Check out that link to WhiBal: one of the cards is a white card.
you use a 18% grey card to measure white balance!
 

LittleWolf

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Jan 23, 2005
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#5
Deadpoet said:
you use a 18% grey card to measure white balance!
I assume that should read "you CAN use an 18% gray card...". There's no special requirement apart from not having a colour cast. A sheetof unexposed, fixed photo paper or inkjet photo quality paper should be good enough for practical purposes.
 

KCLow

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Nov 14, 2004
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#6
I thought white card is to set WB and grey card exposure?
 

Dec 9, 2005
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#8
It looks like a great product but just too damn expensive. I think a gray card would serve it''s purpose at a fraction of the cost. FYI when using a white piece of paper be careful and ensure that it is pure white, some papers have a slight hue to it, it might throw your custom color balance off.
 

Mar 4, 2006
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#10
Thanks for your comments, everyone.

hondasleeper said:
It looks like a great product but just too damn expensive. I think a gray card would serve it''s purpose at a fraction of the cost. FYI when using a white piece of paper be careful and ensure that it is pure white, some papers have a slight hue to it, it might throw your custom color balance off.
Agree about the cost. That's why I'm exploring cheaper alternatives. :D Will check out the grey cards you mentioned.

Kiher's sytrofoam cup idea is also interesting -- it'll still work when wet! ;)

Out of curiosity, anyone here using some other homemade white / grey card or some other homemade alternative for white balancing?
 

Dec 9, 2005
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#11
Formica sample or paint swatches? If you can find one to match the 18% gray card.
 

catchlights

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Sep 27, 2004
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#13
Del_CtrlnoAlt said:
learn something new everyday... i always thought white card = white balance, 18% grey card for metering.
the RGB value for white card is 255, 255, 255.
and the 18% grey is 128,128,128, as long it is neutral in color, can use for white balance setting.
 

smtan24

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Dec 21, 2005
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#14
Those cards look like nylon plastic. What a rip off. Probably cost them a few dollars to manufacture.
 

Mar 4, 2006
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#16
smtan24 said:
Those cards look like nylon plastic. What a rip off. Probably cost them a few dollars to manufacture.
dunno leh. some of the reviewers say very good quality and it really serves its purpose.:think:
 

lsisaxon

Senior Member
Nov 29, 2004
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#17
smtan24 said:
Those cards look like nylon plastic. What a rip off. Probably cost them a few dollars to manufacture.
Yeah.. but they are calibrated. That's the difference..
 

G-man

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Mar 2, 2006
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#18
Evergreen sheet styrene, $9 from Bras Basah Artfriend, or get Tamiya 1mm pla-plate, same thing except Tamiya's come with 1 side matt and 1 side coated with a sheen, so use the matt part. :D :bsmilie:
 

lsisaxon

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Nov 29, 2004
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#19
G-man said:
Evergreen sheet styrene, $9 from Bras Basah Artfriend, or get Tamiya 1mm pla-plate, same thing except Tamiya's come with 1 side matt and 1 side coated with a sheen, so use the matt part. :D :bsmilie:
Have you done a spectral analysis on them? If not, you won't know if they are really neutral.
 

G-man

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Mar 2, 2006
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#20
Well I am just an amatuer hobbyist, so I am quite happy as long as it looks white to me, my colours come out accurate and they work, it's fine by me.

If you're doing it pro, then yea I say invest in something that'll last you a long time. In my case, i have tons of styrene sheets lying around as I build gunpla model kits too so those were good enough for me.:thumbsup:
 

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