腻子粉市场鱼龙混杂，价格从十几块到几十块一袋不等。便宜的未必差，贵的未必好——关键看你会不会挑。以下4招，帮你避开劣质腻子的坑。

The putty powder market is a mix of good and bad, with prices ranging from tens to tens of yuan per bag. Cheap may not be bad, expensive may not be good - it depends on whether you can choose. Here are 4 tips to help you avoid the pitfalls of inferior putty.

第一招：看包装——合格证和标准号是第一道门槛。 选购时先看包装上的生产标准、合格证、厂址、生产日期是否齐全。环保标准要看 GB 18582-2020（《建筑用墙面涂料中有害物质限量》），这个标准对甲醛、VOC等有害物做了严格限制，要求每公斤VOC含量≤10g。性能标准看 JG/T 298-2010（室内用腻子）或 JG/T 157-2009（外墙用腻子）。没有这些标准号的，直接pass。

The first trick: Look at the packaging - the certificate of conformity and standard number are the first threshold. When making a purchase, first check whether the production standards, certificate of conformity, factory address, and production date on the packaging are complete. The environmental standards should refer to GB 18582-2020 (Limits of Hazardous Substances in Building Wall Coatings), which strictly limits harmful substances such as formaldehyde and VOC, requiring a VOC content of ≤ 10g per kilogram. The performance standards can be found in JG/T 298-2010 (Putty for Indoor Use) or JG/T 157-2009 (Putty for External Walls). Without these standard numbers, just pass.

第二招：用手捏——一捏就散的肯定不行。 好的腻子粉手感细腻、粘性大。用手捏一捏，如果一捏就散开，说明粘结力差，质量很一般。质量好的腻子粉是由合理的材料配比、机械化方式生产出来的，粘结力强、耐候性好。劣质腻子通常只是把单一组分胶粉与双飞粉简单混合而成。

Second move: Pinch with your hands - it definitely won't break apart with just one pinch. Good putty powder has a delicate touch and high viscosity. Pinch it with your hand, and if it spreads out immediately, it indicates poor adhesion and mediocre quality. Good quality putty powder is produced by reasonable material ratios and mechanized methods, with strong adhesion and good weather resistance. Poor quality putty is usually made by simply mixing a single component rubber powder with double fly powder.

第三招：试和易性——用灰刀铲一下就知道。 用灰刀铲一些调好的腻子，反过来拿，如果很快就掉下来，说明粘性小、质量差。好的腻子粘性大，不易掉落。另外注意观察：发散、有针孔的腻子质量差。

The third move: trial and easy - just use a gray knife to shovel and you'll know. Scrape some pre mixed putty with a gray knife and take it in reverse. If it falls off quickly, it indicates low viscosity and poor quality. Good putty has high viscosity and is not easy to fall off. Also, pay attention to observation: the quality of putty with divergence and pinholes is poor.

第四招：看防伪——品牌腻子通常有防伪标识。 品牌腻子粉厂家一般防伪意识较强，包装上会有防伪标识或查询码。刮开涂层查真伪，是辨别正品和山寨货的有效手段。

The fourth trick: Look for anti-counterfeiting - Brand putty usually has anti-counterfeiting labels. Brand putty powder manufacturers generally have a strong awareness of anti-counterfeiting, and there will be anti-counterfeiting labels or query codes on the packaging. Scratching off the coating to check authenticity is an effective means of distinguishing between genuine and counterfeit products.

补充一点：腻子粉不是越白越好，过分追求白度可能添加了有害增白剂。正常的优良腻子应该是自然的白色，白度在90以上就算合格。选腻子，安全第一、性能第二、价格第三。

Additional point: Putty powder is not necessarily the whiter the better, excessive pursuit of whiteness may add harmful whitening agents. Normal high-quality putty should be naturally white, and a whiteness of 90 or above is considered qualified. Choose putty, safety first, performance second, and price third.

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