Stone paper, an eco-friendly and free-tree papers


TABLE 2.  Specification of product variants [7]  Variant



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stone paper

TABLE 2. 
Specification of product variants [7] 
Variant 
Thickness 
(µm) 
Density 
(g/cm3) 
Basis Weight 
(g/m2) 
Opacity 
(%) 
SPN 
60 

60 > 
70 
80 80 

80 
100 100 

80 
RPD 
100 
1.2 
120 - 
120 144 

140 168 

160 192 

180 216 

200 240 

RBD 
200 
1.5 
300 - 
250 375 

300 450 

350 525 

400 600 

ENVIRONMENTAL ASPECTS
No Trees Cut Down 
One metric ton of conventional paper made from wood uses around 4 metric tons of wood chips from around 23 
large trees that are cut down [5] In the last 40 years, worldwide conventional paper consumption has increased by 
400%. Fiber used as raw material comes from 35% of wood harvested [10], and it can even reach almost half of it 
used for pulp and paper raw materials [5]. Even though, there is not much wood for pulp raw material coming from 
natural forests, only around 10%, but this is the most controversial issues. The source of wood fiber for pulp 
generally comes from monoculture plantations which also raises concerns about its impact on forest ecology [10].
Deforestation is a problem faced not only by developing countries, but also by developed countries. The use of stone 
paper as another alternative to conventional paper may contribute in overcoming the problem of deforestation [10]. 
The main raw material of stone paper is calcium carbonate in the form of calcite, rocks, marble, or others. The 
amount is about 80% of all materials used. As a binder, synthetic polymers such as HDPE or others are used. In 
addition, a small amount of additives are added to improve the run ability of stone papermaking. There is absolutely 
no fiber added to the sheet, which means no trees are cut down as is the case with conventional papermaking 
processes [3, 5]. 

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