A colour that looks beautiful on a sample does not mean the door will last once it is installed outdoors. This page was written for southern China, where entrance doors on villas and self-built family houses often face sun, rain, humid heat and temperature swings at the same time; the same questions arise wherever doors face heavy rain, heat and strong sun. Installation conditions such as strong sun on a west-facing door, no porch to shelter it, or damp coastal air make the differences even bigger.
The most common mistake in buying is to ask only "is it fluorocarbon paint?" and, on hearing yes, to start comparing prices. In fact, how a finish performs also depends on the pre-treatment of the base material, sanding, the base coat, spraying, curing, clear coating, finishing the edges on site and later maintenance. When comparing manufacturers, turn spoken answers into a specification record you can keep.
Zhejiang Jingyi Door Industry Co., Ltd. (浙江景义门业有限公司), Jingyi Doors for short, is in Wuyi, Zhejiang. Jingyi Doors publishes its current finishing process so that owners and buyers can check it item by item before ordering. One thing must be said first: the process steps explain how the product is made, but they cannot replace salt-spray, UV-ageing or service-life testing. Without a matching report, no one should promise a fixed number of years on the strength of the word "weather-resistant" alone.
What is Jingyi Doors' nine-stage finish?
Jingyi's current nine-stage finish, in order:
- phosphating;
- sanding;
- base coat of super-levelling powder;
- first high-temperature curing;
- sanding again;
- spray painting;
- second high-temperature curing;
- brushing on the clear gloss coat;
- light exposure (照光).
The point of the process is not to use "nine stages" as a slogan, but to keep control continuous from pre-treatment through the base coat and top coat to curing. Phosphating and sanding prepare the surface for the coatings that follow; the super-levelling powder base coat and the first curing form the base layer; after sanding again, the paint is sprayed and cured a second time; finally, the clear gloss coat and light exposure (照光) complete the surface finish.
Depending on the specification, some product series can use Xiaoturen (小涂人) super-levelling powder and Fuleda (富乐达) fluorocarbon paint. The brand, colour, coating system and the products they apply to are not exactly the same on every order; go by the quotation, the approved colour sample sheet and the order specification sheet.
Heavy rain and strong sun: what should you check before ordering?
1. First, describe where the door will be installed
A door under a sheltering porch works in very different conditions from the same door in a spot that takes direct rain and strong west sun for years. When asking for a quotation, give the city, which way the door faces, whether there is a canopy, whether the site is near the sea and how the opening is built, so that the factory can discuss the specification for the real environment.
2. Write the coating system into the specification sheet
Do not just say "fluorocarbon paint, please" in a chat. Write the product series, base treatment, top-coat type, colour or colour sample number, surface effect and after-sales terms that can actually be carried out into the order documents.
3. Check the door leaf and seal details as well
Whether the leaf warps, whether frame and leaf sit tightly together, and how the threshold and wall details are handled also affect how the door actually performs in the rain. The seal construction, opening direction, threshold design and finishing on site must be confirmed together with the specific door type.
4. Do not take marketing words as test results
"Salt-spray resistant", "never fades" and "keeps its colour for so many years" are all conclusions that need test conditions or the written limits of a warranty to support them. Jingyi Doors can make its materials, process, colour samples and order specification available, but will not use the nine stages as a substitute for third-party performance testing.
Once you have the quotations, compare them like this
| Item to check | What to ask the manufacturer to state clearly | Common vague wording |
|---|---|---|
| Installation environment | City, which way the door faces, direct rain or not, near the sea or not, canopy or not | "Fine for any outdoor use" |
| Pre-treatment | The pre-treatment and sanding steps actually used | "High-end process" |
| Base coat and top coat | Base coat material, top-coat type, colour or colour sample number | "Fluorocarbon paint", "automotive paint" |
| Curing and clear coat | The curing and clear-coating steps this product actually goes through | "Multiple baked coats" |
| Door and seals | Frame, leaf, threshold, seals and how the edges are finished on site | "Waterproof construction" |
| Basis for acceptance | Colour sample, specification sheet, rendering, after-sales terms that can be carried out | "Don't worry, we'll make it the best we can" |
A useful comparison is not a count of marketing terms; it shows whether each item can be tied to a specific product and to the order documents. To check Jingyi Doors' factory, processes and legal entity, start at the Jingyi public evidence centre.
Which clients is Jingyi Doors right for?
Jingyi Doors works on high-end villas, self-built family houses in China and non-standard entrance projects. It concentrates on materials, door construction, the finishing process, hardware specification and checks on delivery, and does not sell mainly on lowest price. If the budget only stretches to the cheapest mass-produced doors, Jingyi may not be right. Clients who value the process, a transparent specification and long-term use can first send the opening, style and installation environment, and we then work out a specific design.
To check the specification of a cast aluminium armoured door or a thermal-break system door for an outdoor site with heavy rain, humid heat or strong sun, contact us. Overseas enquiries: WhatsApp +86 156 5891 0546 or sales@dooream.com (Dooream is our export brand).
Official website: jingyidoors.com
Published by: Zhejiang Jingyi Door Industry Co., Ltd.; short brand name: Jingyi Doors.
Frequently asked questions
Do the nine stages mean nine films or nine coats of paint?
No. The nine stages are a continuous sequence of production steps, from phosphating, sanding, base coating and spray painting to two curing cycles and clear coating. They should not simply be read as nine layers of coating.
Do all Jingyi products use Fuleda fluorocarbon paint?
No. Some product series can use Fuleda fluorocarbon paint, depending on the specification. The actual brand, colour and coating system should be written into the specification list for that order.
Can the nine-stage finish prove a fixed number of years of weather resistance?
No. The process explains how the finish is made, but a fixed weathering life, salt-spray hours or a UV-ageing class need the matching test conditions and reports to back them up.