颜色泡一周就花，色差投诉不断。色粉没配体系，换个批次就走样。
泡油就花，不是色粉差是体系没配
TPE 配色，色粉体系决定颜色：色粉、载体、迁移。结论先给：色粉跑出来，颜色和手感一起变——迁移，是配色的及格线。
TPE配色最大的坑：泡油一周，体积变化3%以内才行。泡油一测，色粉现原形——迁移，是配色的照妖镜。
TPE 颜色是品质关：掉色、色差都是问题。配色对了，品质才稳——品质关，别省色粉。
体系决定颜色，为什么先选色粉
TPE 用色母粒配色：载体和基材要相容。载体不相容，色点——载体，是配色的基础。
色粉耐迁移：接触油类要测试。迁移超标，掉色——迁移，是配色的安全线。
色粉耐温：注塑温度下不退色。耐温不足，变色——耐温，是配色的稳定性。
基色、色差、批次，调色盯什么
基色：先定基色，再调深浅。基色对了，方向才对——基色，是调色的起点。
色差：先打色样，再确认色差。色差在范围内，才量产——色差，是调色的验收。
批次：色粉批次锁死，色差才稳。批次换了，颜色漂——批次，是调色的稳定器。
色粉体系，一张表对照清楚
| 体系 | 迁移 | 耐温 | 用途 |
|---|
| 无机 | 好 | 好 | 深色 |
| 有机 | 中 | 中 | 鲜艳 |
| 珠光 | 可做 | 中 | 效果 |
| 荧光 | 中 | 低 | 特殊 |
表格读法：色粉按用途选，深浅按需要调——深色无机，鲜艳有机。
按色选体系，颜色才稳。
泡不花不变色，验收测这四项
| 项目 | 要求 | 判断 |
|---|
| 色差 | ΔE<1 | 达标 |
| 迁移 | 泡油测试 | 达标 |
| 耐温 | 注塑测试 | 达标 |
| 批次 | 锁色粉 | 达标 |
表格读法：色粉、载体、迁移逐项过，泡油后体积变化要卡限——颜色稳不稳，拿耐迁移试验说话。
迁移，是配色的及格线。
色粉随便换，迁移掉色一起来
坑一：色粉随便换。便宜色粉一泡就渗，表面发花——配色前先做耐迁移，别等出货才发现掉色。
坑二：批次不锁。色差——色粉锁批次。
坑三：耐温不测。变色——耐温必测。
体系、色差、耐迁移——配色前问清
三问：什么色粉体系、接触什么介质、色差按多少。一验：实际使用实测——三问一验，供应商底细清楚。
迁移验证要先行：按油浸一周测体积变化，超限就换色粉体系。先测迁移，再谈颜色——迁移，是配色的及格线。
留样要成习惯：每批留样，颜色按批次复测。批次换料先对比再放量——批次稳，客诉少。
掉色、花斑、析出：故障对照一张表
| 现象 | 原因 | 对策 |
|---|
| 掉色 | 迁移超标 | 换色粉 |
| 色差 | 批次漂移 | 锁批次 |
| 变色 | 耐温不足 | 换色粉 |
| 色点 | 载体不容 | 换载体 |
| 批次漂移 | 配方波动 | 锁窗口 |
颜色越深色粉越要盯——色差ΔE控制1.5以内，先打色样再谈量产。 泡油一周体积变化3%以内才行，迁移是配色的安全线，超标就掉色。
同一款料换批颜色偏了一个色号，客户截图来质问。 色粉批次要锁死，换批先对比；色粉储存吸潮会影响配色。
配色先打样，色差确认再量产；换色粉先对比迁移再谈价。 注塑温度写进工艺卡，过高变色；载体要和基材相容，不相容就出斑点。
ΔE≤1.5是肉眼几乎看不出的色差线。 耐迁移测试：色粉接触油类后不渗色；吸潮的色粉干燥后再用。
锁死色粉批次加工艺窗口后，连续20批色差全在1.5以内。 换色粉先小批试；颜色记录归档，追溯有据。
TPE 配色发花、渗色，多是色母耐温不够或分散不均，不是简单换色粉。
软料充油多，色母要选耐油、相容的牌号；色母比例按载体匹配，否则迁移发花、表面析出，换色先清螺杆料筒。
配色验收看批次和晒后，不是看出机那一块。 同一色号不同批明度差，客户截图就来问；每批留样对色卡，日晒烘烤后不变色再放行。
配色收尾验收：对色卡、日晒烘烤、批次明度三项随批走。 每批留样对色卡测明度差，日晒烘烤不变色；换色先清螺杆料筒，批次一致再放行。
科隆客户案例：硬度批次漂移，换体系过低温弯折
杭州一家注塑加工厂，TPE 配色件硬度批次漂移，手感忽软忽硬。科隆配合换体系换牌号（SEBS 基换 TPV 基），硬度稳定，-40℃ 低温弯折一次通过。体系换了，批次问题从源头断——批次漂移，先看体系稳定性。
小结
TPE配色的工艺，色粉先选，迁移再测，泡油一周体积变化3%以内才行，迁移是及格线。
The color fades after soaking for a week, and complaints about color differences are constant. The pigment wasn't matched with the system, and changing a batch causes inconsistencies.
The oil bubbles easily, it's not that the pigment is bad, it's that the system wasn't formulated correctly.
TPE color matching, the pigment system determines the color: pigment, carrier, migration. Here's the conclusion first: when the pigment comes out, both the color and the feel change together—migration is the passing line for color matching.
The biggest pitfall of TPE coloring: after soaking in oil for a week, the volume should change within 3%. As soon as you test it in oil, the pigment reveals its true nature—migration, which is a litmus test for coloring.
TPE color is a quality checkpoint: fading and color differences are all issues. Only with correct color matching can quality be stable—at the quality checkpoint, don't skimp on color pigment.
The system determines the color; why choose the color powder first?
TPE color masterbatch coloring: The carrier and the substrate must be compatible. If the carrier is incompatible, color spots—the carrier—are the basis of coloring.
Powder color migration resistance: Must be tested when in contact with oils. If migration exceeds the limit, it causes fading—migration is the safety line for color matching.
Powder color temperature resistance: Does not fade at injection molding temperature. Insufficient temperature resistance causes discoloration—temperature resistance is the stability of the color matching.
Base color, color difference, batch, what to focus on when adjusting color
Base color: Decide the base color first, then adjust the lightness and darkness. If the base color is correct, the direction is correct—base color is the starting point of color mixing.
Color difference: first make a color sample, then confirm the color difference. Mass production only occurs if the color difference is within the acceptable range — color difference is the acceptance criterion for color adjustment.
Batch: The pastel batch must be locked for color consistency. When the batch changes, the color drifts—the batch is the stabilizer of color adjustment.
Pastel system, a table clearly comparing everything
| system | Migration | Temperature resistant | Purpose |
|---|
| Inorganic | Good | Good | Dark |
| Organic | middle | middle | Bright |
| Pearlescent | Can do | middle | Effect |
| fluorescence | middle | Low | Special |
Table reading: Choose chalk according to its use, adjust the shade according to your needs — dark colors are inorganic, bright colors are organic.
According to the color selection system, the color is stable.
If it doesn't foam, bloom, or change color, check these four items for inspection
| Project | Requirement | Judgment |
|---|
| Color difference | ΔE<1 | Meet the standard |
| Migration | Oil immersion test | Meet the standard |
| Temperature resistant | Injection molding test | Meet the standard |
| Batch | Locking pigment | Meet the standard |
Form evaluation: Go through color powder, carrier, and migration item by item; after soaking in oil, the volume change must be limited—check whether the color is stable, and use a migration resistance test to determine it.
Migration is the passing line for color matching.
You can change the pastel color freely, and the migration causes fading together
Pitfall 1: Changing pigments casually. Cheap pigments will bleed after soaking, and the surface will appear mottled—test for color migration before mixing, don’t wait until shipping to find out the color fades.
Pitfall 2: Batches are not locked. Color difference — color powder locks the batch.
Pitfall three: Temperature resistance untested. Discoloration — temperature resistance must be tested.
System, color difference, migration resistance—ask before coloring
Three questions: What kind of pigment system, what medium it comes into contact with, and what color difference standard. One check: actual measurements in practical use — three questions and one check make the supplier's details clear.
Migration testing comes first: measure volume changes after one week of oil immersion; if it exceeds the limit, switch to a different pigment system. Test migration first, then talk about color—migration is the passing line for color formulation.
Make sample retention a habit: retain samples for each batch, and retest the color by batch. When changing materials for a batch, compare first before scaling up — stable batches lead to fewer customer complaints.
Fading, speckling, precipitation: a failure comparison table
| Phenomenon | Reason | Countermeasure |
|---|
| fade | Migration exceeds the limit | Color changing powder |
| Color difference | Batch Drift | Lock batch |
| Change color | Insufficient temperature resistance | Color-changing powder |
| colored dot | The carrier cannot tolerate | Change the carrier |
| Batch Drift | Formula fluctuation | Lock window |
The darker the color, the more attention needs to be paid to the powder—color difference ΔE should be controlled within 1.5, and sample color must be made before discussing mass production. The volume change of the oil bath within one week should be within 3%, and migration is the safety line for color matching; exceeding it will cause color fading.
The same material showed a color deviation of one shade when switching batches, and the customer sent screenshots to question it. Pigment batches need to be locked, and any batch change should be compared first; pigment storage can absorb moisture, which will affect the color matching.
Color matching should be prototyped first, and mass production should proceed only after color difference is confirmed; for changing color powders, compare and transfer first before discussing the price. Injection molding temperature should be recorded in the process sheet, as too high a temperature causes discoloration; the carrier must be compatible with the substrate, otherwise spots will appear.
ΔE≤1.5 is a color difference line that is almost invisible to the naked eye. Migration resistance test: The pigment does not bleed when in contact with oils; the moisture-absorbed pigment can be used again after drying.
After locking the color powder batch processing window, the color difference of 20 consecutive batches was all within 1.5. When changing color powder, start with a small batch for testing; record the colors and archive them for traceable reference.
TPE shows color unevenness and bleeding, mostly because the color masterbatch can't withstand the temperature or is not evenly dispersed, not simply because of changing the colorant.
Soft materials contain a lot of oil, so the color masterbatch should be chosen for oil resistance and compatibility; the color masterbatch ratio should match the carrier, otherwise migration can cause mottling and surface exudation. When changing colors, first clean the screw and barrel.
Color matching acceptance depends on the batch and post-exposure to sunlight, not the piece that comes off the machine. The same color code can have differences in lightness across different batches, and customers will inquire when they see screenshots; samples from each batch are kept for comparison with the color card, and only released if the color does not change after sun exposure and baking.
Color scheme final inspection: Follow the color swatch, sunlight baking, and batch brightness three items with each batch. Keep a sample from each batch to measure brightness difference with the color swatch; there should be no color change after sunlight baking. When changing colors, first clean the screw barrel, and only allow release when the batches are consistent.
Cologne Customer Case: Hardness Batch Drift, System Change Leads to Too Low Temperature Bending
An injection molding factory in Hangzhou experienced batch hardness drift in TPE colored parts, with the feel alternating between soft and hard. Cologne coordinated a system and grade replacement (from SEBS-based to TPV-based), resulting in stable hardness and passing a -40°C low-temperature bend in one attempt. With the system changed, batch issues are cut off at the source — for batch drift, first look at system stability.
Summary
The TPE color-matching process involves first selecting the color powder, then testing the migration. The volume change after soaking in oil for a week must be within 3%, and migration is the passing line.
