Table 134 – Entries in a type 5 halftone dictionary

Key

Type

Value

Type

name

(Optional) The type of PDF object that this dictionary describes; if present, shall be Halftone for a halftone dictionary.

HalftoneType

number

(Required) A code identifying the halftone type that this dictionary describes; shall be 5 for this type of halftone.

HalftoneName

byte string

(Optional) The name of the halftone dictionary.

any colorantname

dictionary or stream

(Required, one per colorant) The halftone corresponding to the colorant or colour component named by the key. The halftone may be of any type other than 5.

Default

dictionary or stream

(Required) A halftone to be used for any colorant or colour component that does not have an entry of its own. The value shall not be 5. If there are any nonprimary colorants, the default halftone shall have a transfer function.