I just got a bottle of Noodlers Bay State Blue - it lives up to the hype but yes, it stains everything - even my stainless steel kitchen sink!!! But what a great color! I have about a dozen pens inked including with about 4 with other blue inks, Noodler’s Liberty Elysium, Quink Blue Black, Visconti Blue and Noodler’s Electric Eel Blue. I did a comparison and the BSB is a real standout! I put it in a large Hero pen fitted with a Noodler’s flex nib and the shading with the line variation with the BSB is impressive.