Do you sometimes wonder which black ink you should use when you want to colour a stamped image?
Stampin’ Up! have two different black inks. One is their Basic Black Archival Stampin’ Pad and the other is Tuxedo Black Memento Ink.
The important thing to remember is when you are stamping an image in black ink that you then want to colour it in, you want never want to colour it in with the same medium as the black outline or it will smudge.
The Basic Black Archival Stampin’ Pad is a permanent ink and the Tuxedo Black Memento Ink is a water based ink.
The Classic Stampin’ Pads are water based and the new Stampin’ Blends are alcohol based.
If you want to use the new Stampin’ Blends which are alcohol blending markers, you need to use a different medium and therefore you should use the Tuxedo Black Memento Ink. 
If you want to colour an image using the Classic Stampin’ Pads with an Aqua Painter or Blender Pen, or use the Stampin Up! Watercolor Pencils, then you need to first stamp your image with the Basic Black Archival Stampin’ Pad.
If you are just stamping a sentiment in black and no colouring is involved, or you haven’t stamped on a watercolour background, or Stampin’ Blends coloured background, then you can use either black ink for this.
Another tip is that it is always good to have a refill of the ink on hand too. The ink pads for these two black inks, is not the same style as the Classic Stampin’ Pads. They are not so spongy or juicy. They are firmer and more felt like, so they can dry up more easily. Have the Tuxedo Black Memento Refill or Basic Black Archival Ink Refill on hand, and then just add more ink when you need to. If you need to know how to re-ink your ink pad, check out last week’s tip.
I hope you found today’s tip useful and that you now know which black ink to use when colouring, depending on what you are colouring with.