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Uncoated Unbleached Kraft (UUK)
Uncoated unbleached kraft paper is a brown, lightweight, high yield paperboard material that is 100% eco-friendly. Its durability and appearance make it popular for packaging beverage containers and is great for heavy duty retail packaging that communicates your brand initiatives.
- 100% eco-friendly
- Light Weight
- Durable and Tear-resistant
Best Used With
Overview
UUK paper is unbleached, natural kraft paper that is uncoated on both sides. Made from less virgin wood fibre than other paperboards, UUK paper is an eco-friendly packaging material that is lightweight and extremely durable for packaging food and retail products. Although not ideal for printing due to the highly textured surface, UUK paper can be treated the same as bleached paperboard in order to create a printable and wet-resistant surface by using coatings or films.
Cardboard Thickness
Paperboard Thickness and Grammage Conversion Table
| Basestock Properties (Units) | Nominal Basis Weight (GSM) | Caliper (Inches) | Thickness (Microns) | Commonly Used For |
|---|---|---|---|---|
| 12pt | 250gsm | 0.012” | 305μ | Bags |
| 14pt | 275gsm | 0.014” | 356μ | Takeout Boxes, Cups |
| 16pt | 300gsm | 0.016” | 406μ | Heavy duty bags, Takeout Box |
| 18pt | 350gsm | 0.018” | 456μ | All box packaging |
| 24pt | 400gsm | 0.024” | 610μ | Heavy duty boxes |
| 28pt | 527gsm | 0.028” | 710μ | Very heavy duty boxes |
Kraft Color Variance
Kraft paper can differ in shades of brown depending on the paper manufacturer and the amount of raw paper pulp to recycled paper pulp ratio. Kraft colors are identified using color IDs and can be color-matched based on samples.
Kraft Color Variance
Color on Kraft Paper
Kraft paper can alter the color output when printing, making them appear less vibrant and more muted in tone.
White Undercoat with Color
White ink can be used as a base with color applied on top to ensure colors appear more vibrant.
White Ink on Kraft Paper
Using white ink on kraft paper creates a textured contrast on the material due to its natural fibers.