Справочник Пользователя для Ricoh DDP 70e

Paper Grade

No. 1 or No. 4 Xerographic (Note 1)

Fiber Composition

100% chemical wood pulp

Color

White or pastel color

Ash Content

18% maximum (Notes 2 and 4)

Filler

Kaolin or china clay (aluminosilicate) or calcium carbonate. 
Titanium dioxide or magnesium silicate may be added to improve 
brightness.

Grain Direction

Parallel to the long dimension (grain long)

CaCO

3 

Content

0% (Paper that contains CaCO

3 

can drastically reduce fuser life.)

Cutting Method

Rotary precision cut (Lennox, Will, or equivalent)

Cutting Tolerance

Length and width: 

±

 0.787 mm (

± 

0.031 in.)

Squareness: all corners 90

°

 

± 

0

° 

6

′

Basis Weight

16 to 110 lb (60

 

to 199 g/m

2

) (See Notes 3 and 4)

Caliper

16 to 19 lb (60 to 72 g/m

2

): 3.5 to 5.0 mils (90 to 127 

µ

m)

 

20 to 24 lb (75 to 90 g/m

2

): 3.2 to 4.0 mils (81 to 102 

µ

m)

 

Smoothness (Sheffield)

16 to 19 lb (60 to72 g/m

2

): 70 to 170 Sheffield units

20 to 24 lb (75 to 90 g/m

2

): 100 to 200 Sheffield units

Porosity (Gurley)

10 sec/100 ml minimum

Coefficient of Static Friction

0.35 to 0.62 (Notes 3 and 5)

Surface Sizing

Starch - Do not use synthetic surface sizing

Internal Sizing

Acid Rosin or synthetic
(alkylketene dimer or alkyl-succinic anhydride)

Stiffness (Taber)

16 to 19 lb (60 to 72 g/m

2

): MD 1.4 min./CD: 0.5 min.

20 to 24 lb (75 to 90 g/m

2

): MD 1.7 to 4.5 min./CD: 0.8 to 2.4 min.

Moisture Content

3.7% to 5.5% by weight (Notes 3 and 4)

Surface Resistivity

5 x 10

9 

to 1 x 10

12

 

ohms (Notes 3 and 6)