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Board Grades
Corrugated Board is made up of various liners and fluting:
Paper grades for the liner - outer and inner
(K) KRAFT - Virgin Kraft paper
(T2) TEST 2 - Partly recycled liner paper
(T) TEST 3 - Fully recycled liner
(C) CHIP - Waste based liners
(BW) FULLY BLEACHED WHITE - Fully bleached Kraft liner
(WT) WHITE TOP - White coated recycled liner
(MK MOTTLED KRAFT - Mottled white Kraft
(OY) OYSTER - Mottled test liner
Common Paper Weights
GSM=grammes per sq m
115/125 GSM
140/150 GSM
185/200 GSM
300 GSM
Common Flute Grades and Weights
Fluting is generally produced using waste based fluting medium (WBF), semi-chemical fluting (SC) medium is used for enhanced properties.
Flute Medium Weights
90 GSM WBF
105 GSM WBF - Most Common Flute Standard
112 SC and WBF
150 SC and WBF
175 SC and F
Wet strength adhesive can be used for certain applications
There are a number of common flute profiles or sizes
A FLUTE - 5mm - A - Good stacking and protection
B FLUTE - 3mm - B - Good puncture resistance + Most Common Grade
C FLUTE - 4mm - C - Good stacking and protection + Very Common Grade
E FLUTE - 1.5mm - E - Lightweight fine flute
F FLUTE - 1.2mm - F - Extra thin
BC FLUTE - Flute Double Wall 6mm - BC - Combination of B + C flutes
The various liners and fluting medium can be selected to produced A Board as a single wall board or double wall board.
Single Wall Board - 2 liners and single flute
Double Wall Board - 3 liners and double flutes
Triple Wall Board - 4 liners and three flutes
Common Board Grades
When choosing a board grade this may be a guide to common grades
Paper Combination:
125K/125T - B Flute - Light Standard Grade
150K/150T - B Flute - Common/Medium Grade/Postal Grade
200K/200T - B Flute - Heavier/Durable Board
300K/300T - B Flute - Very Heavy/Strong Board
To increase the cushioning or the stacking strength of the box change the 'B flute' for a 'C Flute'. For example 125K/125T - C Flute.
If you really want to beef up the packaging specification then change the single flute either 'B' or 'C' for a much stronger double wall (double fluted) board.
Example:
200K/200T/B Flute = is equal to 125K/125T Double Wall
The liners can also have special coatings, finishes or properties
Polythene
Anti Static
Conductive
Colour Wash
Water Resistant
Fire Resistant
Anti Abrasive
Acid Free
Clay Coated
Soft Tissue
Post Consumer/Recycled
Exposed Flute
Pre Print
Sesame Tape
Rippa Tape
Foam Lined
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