I tried using Basic Black on a tile and it feathered or bled as it was soaked into the tile - can't quite explain what it looked like except if you've seen lipstick feather or vein it was kind of like that. So, from then on I stuck with Stazon for the main image on the tile then color it in with Sharpies, chalk, or fabrico markers. With chalk or Fabrico you definitely have to seal. With Sharpies you can hold the tile under a running faucet and it won't wash off.
Hope that helps.
~ Bonnie
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