Rich Black Composition Lookup

Caller independently verified press/profile/substrate rich-black separation recipe notice; not universal CMYK build or printing ordinary artwork at registration 100%allinks. Exact independently verified context/edition key; not embedded or live reference data. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.

Description

Rich black uses a process-specific ink composition and coverage limit.

Rich black uses a process-specific ink composition and coverage limit.^[1]

A supplied reference notice does not calculate a universal CMYK recipe or validate press suitability. Use Rich Black Composition Lookup to retrieve an exact caller-supplied reference entry.

When to use Rich Black Composition Lookup

Use Rich Black Composition Lookup to retrieve an exact caller-supplied reference entry. Choose an independently reviewed reference for the exact historical, cultural or technical context, then supply its keys and texts.

How to use Rich Black Composition Lookup and understand its results

Choose an independently reviewed reference for the exact historical, cultural or technical context, then supply its keys and texts.
Enter Caller verified rich black keys, Caller verified rich black notices, Query rich black key using the field table and validation rules below, then run the tool.
Read Matched caller notice; interpret the units, signs, ordering and unknown-value placeholders described below.
Correct reported input errors and rerun. Apply successful results according to their specific meanings and check the assumptions before using them in a decision.

Input field	Meaning	Value type	Requirement
callerVerifiedRichBlackKeys	Caller verified rich black keys	array of string	Required; constraints below
callerVerifiedRichBlackNotices	Caller verified rich black notices	array of string	Required; constraints below
queryRichBlackKey	Query rich black key	string	Required; constraints below

Provide aligned, nonempty arrays of reference keys and independently verified notices, then enter the exact query key. Keys must be unique, nonblank and at most 128 UTF-16 code units long; notices must be nonblank. Matching is case sensitive and does not trim the query or returned text. The matching notice is returned unchanged; an unknown key is an input error. The reference contents and their applicability are supplied by the caller; the tool does not retrieve external records or verify source authority.

matched reference = suppliedTexts[indexOfExactQueryKey(suppliedKeys)]

Use the field order, units and branch conditions described above.

Output field	Meaning	Value type
matchedCallerNotice	Matched caller notice	string

json

{
  "input": {
    "callerVerifiedRichBlackKeys": [
      "context-a/edition-a",
      "context-a/edition-b"
    ],
    "callerVerifiedRichBlackNotices": [
      "independently verified reference a",
      "independently verified reference b"
    ],
    "queryRichBlackKey": "context-a/edition-b"
  },
  "output": {
    "matchedCallerNotice": "independently verified reference b"
  }
}

Limitations and assumptions

A supplied reference notice does not calculate a universal CMYK recipe or validate press suitability. Apply the exact scope and assumptions explained above.

All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse arrays fail validation. Domain-specific bounds, alignments and supported tokens are explained above; extremely large inputs or outputs can also be rejected. Input errors differ from successful false results, empty match lists and unknown-evidence placeholders.

Alternative or Complementary methods

Use Spot vs Process Cost Factor Lookup for a related task: Spot and process print quotes can be compared on one currency and job basis.

Use Trapping Overprint Requirement Basic Check for a related task: Trapping and overprint decisions depend on printing-process evidence and a defined rule set.

References

Rich Black Composition Lookup — tool.io

Similar or alternative tools

Spot vs Process Cost Factor Lookup
Spot and process print quotes can be compared on one currency and job basis.
Trapping Overprint Requirement Basic Check
Trapping and overprint decisions depend on printing-process evidence and a defined rule set.