Pentel Slicci pens, just like Pilot G-Tec C4 pens, were intended for use as a writing pen rather than a tool for colouring, but I've found they have a dual use for intricate details so often found in adult colouring books.
The range of colours available is limited but includes metallics which are great for colouring realistic jewellery and machinery.
Physically, the pens are very slim and lightweight, so light it barely feels like you're holding anything at all which is ideal for people who colour over extended periods of time. The pens feature a very precise nib, finger grip and a clear barrel so you can check how much ink is left. The caps are branded with the Slicci name and also tell you the pen's nib size so you can pick them out at a glance.
Pentel Slicci come in 4 different nib sizes: 0.3, 0.4, 0.7 & o.8mm. The ink is very fast drying which is great for those colourists who have problems with smudges on their work, and they flow really smoothly on the paper without clogging or skipping areas. Surprisingly for a pen with such a thin, sharp tip, they don't feel scratchy or leave indents in the paper at all.
As I mentioned earlier these pens don't come in a huge plethora of colours but certainly enough basic shades, including this selection below:
The pens are predominantly sold separately for around £2.50 each, so they're not cheap but the quality and longevity of the ink is worth it I feel. There are packs of 12 available for just over £20 but I'd advise you to try one or two of the different nib sizes first to see how you get on with them.
Here's the whale I'm working on in Lost Ocean, coloured with the Slicci pens. As you can see the needle-point nibs get right into the smallest of spaces and give vibrant, bold colour. Often, gel pens can be very wet with a thick line that isn't suitable for this kind of intricate work, which is where pens like the G-Tec C4 and Slicci come in very handy.
You can find all sizes and colours on Cult Pens with FREE UK DELIVERY right here.