Uncoated Unbleached Kraft (UUK)
Uncoated unbleached kraft paper is a brown, lightweight, high-yield paperboard that is 100% eco-friendly. Its durability and natural appearance make it popular for packaging beverage containers and ideal for heavy-duty retail packaging, effectively communicating your brand's eco-friendly 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 with less virgin wood fiber than other paperboards, UUK paper is an eco-friendly packaging material that is lightweight and extremely durable, making it ideal for packaging food and retail products. Although its highly textured surface is not ideal for printing, UUK paper can be treated with coatings or films to create a printable and wet-resistant surface, similar to bleached paperboard.
Cardboard Thickness
Paperboard Thickness and Grammage Conversion Table
Corrugated Board Performance
Single Wall
| 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 vary in shades of brown depending on the manufacturer and the ratio of virgin to recycled paper pulp used. These kraft colors are identified using specific color IDs and can be precisely color-matched based on samples.
Kraft Color Variance
Color on Kraft Paper
Printing on kraft paper can alter color output, causing colors to appear less vibrant and more muted in tone.
White Undercoat with Color
Using white ink as a base layer with color applied on top can ensure that printed colors appear more vibrant on kraft paper.
White Ink on Kraft Paper
Using white ink on kraft paper creates a textured contrast due to the material's natural fibers.