1.1 最好使用透明無色的橡膠或矽膠。1.2 半透明或不透明的橡膠或矽膠材質將部分或完全覆蓋夜光效果。

夜光橡膠和矽膠常用於製作工藝品、玩具、家居用品、裝飾品等。

夜光粉安全、無毒、環保。通過歐洲標準 SVHC測試，確保它們可以與油漆混合用於玩具、餐具、衣服等。

矽膠、橡膠中添加夜光粉的比例，對產品的夜光效果有直接的影響。添加的粉末越多，發光效果越好，但還有其他重要因素要考慮：

• 產品結構：

If the structure of the product is designed to be closed by different parts (with seams) rather than one-time molding, then the proportion of luminous powder added is recommended to try from a smaller amount, such as 2%-4%. Glow in the dark powder is a granular powder, similar to fine sand. It will not dissolve when mixed with silicone and rubber. If it is added excessively, it may cause the problem that the seams cannot be completely closed.
If the product is made by one-time molding, such as silicone ball, silicone bracelet, etc., you can try to add a higher proportion, such as 20-30% to get a better luminous brightness.

• 彈性：

當製品要求彈性較高時，如橡膠手套、保險套等，若添加比例過高，則會導致彈性下降，易斷裂等問題。因此建議初始添加比例控制在1-2%，在此基礎上逐步找出最佳添加量。

• 厚度：

對於厚度較薄的產品，例如橡膠手套，保險套等，我們需要指定產品的確切厚度。根據這些資訊，我們會推薦合適粒徑的發光粉。在生產過程中也建議優先嘗試1-2%，以便準確掌握生產可能性。

一些矽膠或橡膠產品在生產過程中涉及硫化。製品在進入硫化工序時，一般需承受130 – 200℃左右的溫度，持續時間幾分鐘到幾十分鐘。針對這種情況，有的客戶就對夜光粉在此溫度下是否能正常使用產生了懷疑。其實，夜光粉就可以滿足這個要求。

以下是我們橙色夜光粉的高溫測試細節。測試樣品中，最右側標示「未加熱」的樣品，顯示的是加熱之前的體色和發光效果。試驗在以下條件下進行三次：210°C下30分鐘，210°C下60分鐘，280°C下5分鐘。從最終的測試結果來看，產品的本體顏色以及發光顏色均未出現明顯的變化。這充分說明我們的夜光粉在上述高溫條件下具有良好的穩定性，可以應用於需要硫化的矽膠或橡膠製品

Issue 1: Uneven luminescence, the product shows the phenomenon of high brightness in some areas and low brightness in other areas

可能的原因：

• Insufficient dispersion of luminous powder:

In the silicone or rubber system, the mixing process of luminous powder fails to achieve uniform dispersion, resulting in the phenomenon of agglomeration of luminous powder particles, which affects the uniformity of the overall luminescence of the product.

• Luminous powder settling:

The specific gravity of luminous powder is relatively large about 3.6g/cm³. During the mixing process, the particles are prone to settle. It leads to uneven distribution of luminescent powder in different parts of the product, resulting in differences in luminous brightness.

解決方案：

• Optimize the adding method:

Add luminescent powder with small amount and several times, avoid adding a large amount at one time, in order to reduce the difficulty of luminescent powder dispersion, and promote its uniform distribution.

• Adjust the mixing and curing process:

Prolong the mixing time to ensure that the luminous powder is fully dispersed in silicone or rubber. When reaching the evenly dispersed state, curing operation should be carried out immediately to prevent the glow in the dark powder from settling.

• Adjust luminous powder parameters:

Consider the use of smaller particle size of the luminous powder, or moderately reduce the proportion of luminous powder added, in order to alleviate the problem of settlement due to the greater specific gravity, to enhance the uniformity of the emitted glowing light.

Issue 2: The finished product’s luminescence appears mottled phenomenon

可能的原因：

• Luminous powder particle size is large:

When large size particles are used, it will make the gap between the luminous powder particles increase, and it is difficult to achieve a close and comprehensive coverage inside the product.

解決方案：

• Changing to smaller particle size:

Based on the characteristics of luminous powder, the smaller the particle size, the luminous brightness of individual particles will usually be weaker. However, when applied to final products, smaller particle sizes will spread more evenly and reach a higher coverage. This helps the light to achieve more effective scattering and reflection on the surface of the product, which significantly improves the overall luminous uniformity of the product and makes the finished product show a more transluscent luminous effect.

Issue 3: Insufficient luminenscence of the final product

可能的原因：

• Dark color paste is used for dyeing:

Dark color usually has strong light-absorbing properties, which will absorb a large amount of light emitted by the luminous powder, and the luminous effect perceived by the naked eye is obviously weaker.

• Luminous powder added proportion is low:

When the proportion of luminous powder is too small, the luminous powder content per unit area or per unit volume is not enough, resulting in insufficient luminous brightness.

• Luminous powder brightness level is low:

When the luminous powder itself is low brightness level with poor luminous performance, even if the addition ratio is high, the final luminous brightness is difficult to reach the desired state.

解決方案：

• Recommended to choose light color or high transparency color:

This kind of colors can reduce the coverage of luminescence. The lighter and more transparent the color, the more light can be fully reflected and show, so as to protect the luminous brightness of the product.

• Increase the proportion of luminescent powder added:

By increasing the actual content of luminescent powder per unit area or per unit volume, it can effectively improve the luminescent effect of the product.

• Upgrade the quality of luminescent powder:

Under the condition of maintaining the existing addition ratio unchanged, upgrade to luminescent powder with higher brightness level. By virtue of the excellent luminous performance of high level, the luminous intensity can be significantly improved.

Issue 4: Color fading, or glowing color changing

當採用有色夜光粉或自染時，硫化後最終產品的體色會逐漸褪去，有些發光顏色也會改變。

可能的原因：

• Dyes fading

彩色夜光粉是使用天然夜光粉與彩色螢光粉作為染料，經由物理混合而成。自染製程所使用的螢光粉或染膏無法承受較高的硫化溫度，造成顏色褪色。此時所呈現的發光顏色僅為天然夜光粉本身的顏色。因此產品的機身顏色與發光顏色與期望不符。

解決方案：

• Choose high temperature resistant glowing pigments:

When performing dyeing operations, it is necessary to use fluorescent powders or dyes with high temperature resistance characteristics. These heat-resistant materials remain stable under the high temperature environment of vulcanization, ensuring that the body color and glowing color can maintain the desired effect.

Issue 5: Uneven surface of the end product

可能的原因：

• Glow in the dark powder particle size is larger than the thickness of the product:

The particle size of glow in the dark powder is generally expressed as “D50（平均粒徑）”，表示區間的一個大概範圍，並不是絕對的固定值。在這個間隔之外也存在著不同大小的粒子。當大顆粒的粒徑超出了製品本身的厚度時，在製品成型過程中，這些大顆粒就會凸出於製品表面，導致製品表面出現凹凸不平的情況。

• The proportion of luminous powder is too high:

When the proportion is too high, the number of large particles will also rise significantly. The presence of a large number of large particles makes the product surface unevenness will be more significant, seriously affecting the product appearance.

解決方案：

• Accurately match the particle size of luminous powder:

It is recommended to communicate with luminous powder suppliers in time to get the D90 or Dmax data of luminous powder, based on which to select the most suitable powder type. At the same time, you are welcome to contact us. We will recommend the appropriate granular type according to our previous experience and the specific characteristics of your products for your experiments.

• Reduce the proportion of luminescent powder:

By reducing the overall amount of luminescent powder, we can effectively reduce the proportion of large particles of luminescent powder in the system, so as to improve the molding effect on the surface of the product, and make the surface more flat.

Issue 6: When the end product is designed with joints, the joints cannot be closed

可能的原因：

• Excessive proportion of luminous powder:

Luminous powder is essentially a granular substance with a hard texture, and its properties are similar to sand. If the proportion added is too high, too many particles will gather in the joints. It will lead to the microstructure of the joints become uneven, greatly increasing the difficulty of bonding the joints, and making it difficult to close the joint smoothly.

• Excessive particle size:

When the particle size is too large, they are difficult to tightly arranged at the product joints, which will easily cause unevenness at the joints and hinder the normal bonding and closure of the joints.

解決方案：

• Reduce the amount of luminescent powder:

By reducing the amount of luminescent powder, it can effectively reduce the accumulation of particles at the joint. Also it can diminish the unevenness of the joint, thereby creating favorable conditions for the smooth bonding and closing of the joints.

• Choose finer particle size:

Finer particles can be more closely arranged at the joints, which can enhance the flatness of the joints, thereby significantly improving the adhesive effect of the joints, to ensure it can be closed smoothly.

Issue 7: Products with high stretchability are prone to breakage, such as ultra-thin rubber gloves or condoms

可能的原因：

• Excessive proportion of luminous powder:

Luminous powder is a hard granular substance with no elasticity or stretchability. If the proportion of luminous powder added is too high and too many hard particles are filled inside the product, it will significantly change the original microstructure of the product, weaken the elasticity and tensile properties of the product, and lead to the easy occurrence of fracture when the product is subjected to tensile stress.

• Excessive particle size:

When the particle size is too large, the microstructure formed inside the product becomes rougher and more uneven. These large particles are difficult to deform together with rubber or silicone when the product is subjected to stretching. This makes the product easy to break during normal stretching.

解決方案：

• Reduce the amount of luminous powder added:

By reducing the amount of luminous powder used, the number of hard particles inside the product can be effectively reduced, reducing their negative impact on the elasticity and tensile properties of the product, and reducing the risk of product breakage.

• Choose finer luminescent powder:

Finer granulars can be more evenly dispersed inside the product, forming a relatively finer and more uniform microstructure, so that when the product is subjected to tensile stress, various parts can deform more harmoniously, thereby improving the tensile performance and fracture resistance of the product.