SINFONE BUYER GUIDE: COLOR AND APPEARANCE ISSUE WORKSHEET
Published: October 11, 2026
Guide: https://sinfone.co/masterbatch-color-troubleshooting/

Record what was observed. Mark missing information "unknown."
An appearance issue does not establish its cause or assign fault.
This worksheet does not prescribe machine settings or corrective action.

1. OBSERVATION
Issue description (uneven appearance / streaks / dark specks / other):
Location on the part or film:
When the issue appeared / was observed:
All checked samples or only some? State what was actually checked:
What was directly observed versus reported by another person?
Expected reference and exact difference questioned:
Any measurement result, unit, method and conditions:

2. PHOTOS AND PHYSICAL SAMPLES
Photo filenames with sample IDs and dates:
Which image is the reference? Which is the questioned run?
Overview and close-up supplied:
Viewing conditions / any image editing:
Physical reference available:
Affected physical samples available:
Sample transfer agreed with supplier (if relevant):

3. MATERIALS AND RUN
Your role and information you can confirm:
Masterbatch sample name or grade and lot:
Base resin used in the finished product (grade and lot, if known):
Masterbatch carrier request, if any (separate from base resin):
Other materials used in the run, if known:
Processing method and finished application:
Trial date / run ID / finished-sample IDs:
Agreed recipe / operating procedure reference and version:
Relevant production record available for review:

4. CONTEXT AND COMPARISON
Timeline of the observation:
Documented changes in materials / equipment / recipe / conditions:
Control or other comparison sample ID:
What was the same between the comparison and questioned run?
What differed?
Information not available or still awaiting processor confirmation:
Questions or proposed explanations (not established causes):

5. REVIEW AND FOLLOW-UP
What additional information is requested?
Who will review the evidence?
Agreed next step, owner and date:
Technical conclusion, only if confirmed by the responsible review:
Evidence supporting that conclusion:
Follow-up result and date:

Share only information and images you are authorized to disclose.
Any further trial should follow the responsible production team's approved
procedure and equipment guidance. Record authorized changes separately.
Keep original observations separate from later conclusions.

Contact: patrick.yang@sinfone.co
Website: https://sinfone.co/