APPENDIX No. 1

Technical specification for led-uv printing

Kunke Poligrafia Sp. z o.o.

ThisdocumentconstitutesAppendix No. 1 to the General Terms and Conditions of Kunke Poligrafia Sp. z o.o. dated 20 December 2025 and is of a purely technicalnature.
Allmattersrelating to liability, complaints, warranty, and legalconsequences of non-conformity aregoverned exclusively by the General Terms and Conditions (GTC).

1. FILE ACCEPTANCE (PREPRESS)

1.1. File format: PDF, minimum version 1.4, compositefiles.
1.2. Colormode: CMYK only. RGB, LAB colorspaces and embedded ICC profilesare not permitted.
1.3. Bleed: minimum 3 mm on eachside.
1.4. Safetymargin: minimum 3 mm from the trimmingline.
1.5. Maximum totalinkcoverage (TAC): 290% (highervaluesrequire manual reduction).
1.6. Image resolution: minimum 300 dpi (color and grayscale).
1.7. Black text: 100% K only (C:0 M:0 Y:0 K:100), no underprint.
1.8. Reverse (knockout) text: minimum 6 pt.
1.9. Die-cuts, UV varnishmasks: to be supplied as separatefilesor as anadditional spot color (100% K, vectorobjects, set to overprint).
1.10. File standard: PDF/X-4 (Acrobat 1.6 orlater).

2. COLOR PARAMETERS

2.1. Colorspace: ISO Coated v2.
2.2. Color proof:certifiedFogra proof recommended – MediaWedge 3.0.
2.3. Colortolerance: ΔE ≤ 5 (according to ISO 12647-2).
Colorconformityassessmentisbasedexclusively on industrystandards, not on subjectivevisualexpectations.

3. INKS AND LED-UV TECHNOLOGY

3.1. Printing technology: LED-UV offset printing (powder-free).
3.2. Presses: Heidelberg Speedmaster XL LED-UV.
3.3. Curing system: LED-UV diodes.
3.4. Inks:Toyo Ink LED-UV – CMYK + spot colors.
3.5. Lightfast FD LED RESISTANT inks:

  • TU541913X – Yellow
  • TU541942X – Magenta

3.6. Toyo LED CX inks:

  • TU542013 – Cyan
  • TU542014 – Black

3.7. Registrationtolerance: ±0.2 mm.
3.8. Run stability: ±5%.
3.9. Substrates:coated and uncoatedpapers, electrostaticfilms, PVC, PET, PP.
3.10. Productionconditions:temperature 20–24°C, humidity 45–55%.
3.11. Qualitycontrol: X-Rite i1Pro / TechkonSpectroDensspectrophotometers.

4. POSTPRESS – FINISHING AND CONVERTING

4.1. Lamination

  • Films: gloss, matte, soft-touch, velvet, anti-scratch, textured.
  • Technology: coldor hot lamination (selecteddepending on substrate).
  • Laminationalignmenttolerance: ±1 mm.
  • Laminatesmayaffectcolor tonality (colordeepening, contrastchanges).
  • Adhesiontestingrequired for electrostatic and syntheticfilms.
  • Soft-touch and velvetfilmsareprone to scratching and fingerprints – thisdoesnotconstitute a defect.
  • Creasingafterlaminationisrecommended for folded products.

4.2. Die-Cutting

  • Dieforms: 23.8 mm steelrules + flexiblerubber.
  • Dimensionaltolerance: ±1.5 mm.
  • Press pressure: 150–250 tons.
  • Syntheticsubstratesmayexhibitminimalstretchingorshrinkage.
  • Test dierecommended for precision jobs.
  • Micro-cracksalong the cutlinethatareinvisibleafterapplication do notconstitute a defect.

4.3. Cutting

Cuttingtolerances:

  • up to B1 format: ±1 mm
  • largerformatsormultilayer products: ±2 mm

Cuttingperformed on hydraulicguillotines with automatic clamping.
For syntheticsubstrates, minor edgedeformationsareacceptable.

4.4. AdditionalFinishing

Visual and functionalcharacteristicsresulting from materialproperties, LED-UV technology, and finishingprocessesaretechnological in nature and do notconstitute a productdefect.

UV varnish and coldstamping: increasedsensitivity to scratching and temperature – doesnotconstitute a defect.
Varnish proof or test mock-uprecommended.

5. STORAGE AND USE

5.1. Storage conditions: 15–25°C, humidity 40–60%, no exposure to UV orheatsources.
5.2. Improperconditionsmaycause:

  • film wavinessordelamination,
  • laminateseparation,
  • discoloration and pigment migration,
  • adhesivelayerissues.

5.3. Stickerapplication: 15–30°C, surfacesclean, smooth, and degreased.
5.4. Outdoororextremeconditions: test applicationrecommended.
5.5. The printing houseshall not be liable for qualitychangesresulting from:

  • improperstorage,
  • excessive UV exposure,
  • contact with solventsordetergents,
  • application on chemicallyunstablesubstrates.

5.6. Recommendedproductusage period:up to 6 months from the deliverydate.