The pens have a water-based ink that won't bleed through your paper (applies only to paper weights of at least 80 grammes)

while its acid-free

This black eraser from Tombow is dust free

giving a nice

30 ml refill bottle with water-based creative medium for diluting and brightening up without losses in quality and stability

pentel graphgear 500 mechanical pencil 0 3 mm multivariantcolorpicker The pens have a water-basedThe Pentel GraphGear 500 is a high quality mechanical pencil built to last, made from a mix of metal and plastic that can take serious use. Its textured barrel gives a secure grip, letting you write and draw with great precision. The pencil has a retractable tip mechanism that protects the fine metal point when not in use, keeping it safe and preventing accidental holes in your pocket or bag. It comes with a 0. 3 mm lead, perfect for detailed work,