NEW PRODUCTS | Ironlak Sketchbook. Leave a Comment / Ironlak Asia, Ironlak Europe, Ironlak New Zealand, Ironlak South America, Ironlak USA / By Ironlak Features: – Hard cover (mock leather) with subtle Ironlak logo embossing. – Large A4 format. 150 lightweight acid-free pages (90gsm), waxed on one side to prevent bleed through. – Perfect for use with Ironlak Strikers and Technical Drawing Pens. Click to view larger.