ISO 06148:2001 pdf download

ISO 06148:2001 pdf download.Photography – Micrographic films, spoolsand cores- Dimensions.
3.12
preferred sizes
standard industry sizes, determined by most frequent user demand (number of units) and product volume (square metres)
NOTE Designers of new equipment are encouraged to use preferred sizes whenever possible.
3.13
recognized sizes
sizes which are in less demand than preferred sizes, but are used in sufficiently large amounts to justify identification in standards
NOTE This category includes sizes whose popularity is diminishing or increasing. However, new equipment should not be designed for such sizes.
3.14
splice
union of two pieces of film that are joined to form a single piece (usually found in roll format)
3.15
spool
flanged, cylindrical core for roll film, with drive holes in each flange and axial holes for insertion of a spindle or pin
3.16
tolerances
dimensions which define the boundaries of conformance of a product to the standard
NOTE When tolerances are expressed as “±“, the reference is to the aim dimension, not to the nominal.
3.17
vesicular film
low-speed imaging material on a polyester support, coated with a thermoplastic layer containing a UV-sensitive diazonium salt which, upon exposure to actinic radiation, results in decomposition of the diazonium salt and the formation of a nitrogen gas
NOTE Brief post-exposure heating of the film softens the binder layer and permits localized formation and trapping of tiny nitrogen gas bubbles, or vesicles. These scatter light and thereby can function as image elements under proper illumination and viewing conditions. To render such “bubble” images permanent, a second, uniform exposure is given and the resulting nitrogen gas is allowed to diffuse gradually to the surface and escape into the atmosphere.
4 Conditions for measurement of dimensions
The dimensions and tolerances specified in this International Standard shall apply at the time of manufacture
(except where specifically stated otherwise), when measured under atmospheric conditions of 23 °C ± 2 °C and
50 % ± 5 % relative humidity, as specified in ISO 554.
All measuring instrument calibrations should be conducted at a temperature of 20 °C (as specified in ISO 1) and a relative humidity of 50 %.
5 Film thickness
For all micrographic films, except thin non-silver duplicating films, the thickness ranges of the film (including support, sensitized layers and any protective coatings) shall conform to the values given in Table 1.
Thickness of non-silver duplicating micrographic films shall conform to the values given in Table 2.
7 Spools
7.1 Dimensions
Spool dimensions shall conform to the dimensions listed below:
— 16 mm: as shown in Figure 1 and as given in Table 6; 35 mm: as shown in Figure 1 and as given in Table 7;
— 105 mm: as shown in Figure 2 and given in Table 8.
7.2 Preferred design
The preferred spool design specified in this International Standard calls for a single keyway in both flanges. This design results in spool manufacturing economies because it permits a single flange design for 16 mm and 35 mm spools.
7.3 Offset drive holes
The two offset drive holes (see Figure 1) are optional for both flanges of 16 mm and 35 mm microfilm spools. These drive holes assure correct orientation during loading in hardware utilizing the two-drive-pin design.
Because of plastic moulding techniques in use, the offset drive holes may be rotated from the position shown in Figure 1. However, in spite of their appearance, these offset drive holes shall be functionally the same as those shown in Figure 1.
NOTE If two drive pins are used by hardware manufacturers, a round spindle is required for the duo-microfilm format to accept both metal and plastic spools.
7.4 Dimension K
If rivet heads or other fastening devices extend beyond the outer surface of the flange, they should lie outside the K
diameter area (see Figure 1), but within the boundaries defined by the volume of the rotation diagram.
7.5 Dimensions J and J1
Dimensions i and J1 represent the thickness and effective thickness, respectively, of the spool with a K diameter area, which is centred on the spindle hole axis of each flange.
7.6 Dimension P
A reference plane of rotation for each flange is defined by a plane perpendicular to the axis of the spindle and coincident with the surface of a flat support of 15,0 mm (basic dimension), which is in contact with the flange and centred on the spindle hole axis of the flange.
The dimension P is the distance measured outwardly from this reference plane of rotation to the plane of rotation generated by the thickest and most eccentric point on the flange outside the K diameter area when the spool is rotated on an accurate, tight-fitting spindle. This includes rivets or other fastening devices, variations in flange thickness, flatness, and lateral runout of the flanges.
7.7 Flanges
Flanges shall be opaque and shall have low-reflectance characteristics.
Flanges of 105 mm spools shall be 1,15mm ± 0,1 mm in thickness.