marking frag disks

marking frag disks

Postby 120gallons » Fri Nov 07, 2008 11:36 am

Does anyone know if it is safe to write on the bottom of a frag disk with a sharpie or pencil for identification? Any toxicity?
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Postby mpedersen » Fri Nov 07, 2008 11:53 am

Brian, it's been a while!!! Nice 2 C U!

I'm gonna move this into the Asexual Coral Prop forum - might get better attention there.
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Postby DThom » Fri Nov 07, 2008 12:15 pm

I know I have used a permanent marker on something in the water and it did not cause any problems. Just made sure it was completely dried before putting it in the water.
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Postby William » Fri Nov 07, 2008 12:16 pm

I would not hesitate to use a pencil. Pencil lead is made from graphite / clay. Should be fine. But I would worry about how long it would last before it washed off.

Who knows what is in a sharpie - I would probably not use that.

I would recommend a crayon. The ingredient (wax) should be safe, and its hydrophobic nature should mean that will be resistant to washing off.
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Postby Spracklcat » Fri Nov 07, 2008 11:48 pm

Sharpie is just fine--wax pencil is fine too, pencil is fine--all good. Just make sure the marker ink is dry first, just to be safe.
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Postby KathyL » Sat Nov 08, 2008 12:08 am

Agreed, Sharpies are perfectly safe.
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