*1 Alumite Treatment: When Aluminium is exposed to the air, it oxidizes and creates micro-thin oxide coating on the surface. This micro-thin oxide coating is corrosive resistant and resists rust. However, this oxide coating can be corroded by chemical reaction. Therefore, we need to do a surface treatment to thicken this coating artificially, which is called “Alumite Treatment” (Anodization Treatment).

*2 Aluminium: Nickel based chemical is used for the sealing treatment process. After the Alumite treatment, the micro-holes are made on the surface of the Aluminium and we need to do a Sealing Treatment to fill up the holes. (Please refer to the picture.) Our Sealing agent is completely Nickel-Free.

Switch to Nickel Free Alumite Sealer! Nickel causes an allergy
Nickel causes environmental problem

Aluminium is used for precision machineries such as smartphones or cameras.
Nickel compound is widely used in the Alumite treatment process.
However, Nickel is one of the top heavy metals to cause metallic allergies.
Therefore, we need to take action to look ahead to future regulation now. *3

The features of new Nickel Free Alumite Sealer

New Nickel Free Alumite Sealer has an equal ability compared
with conventional ones.

Our recommended Bath Condition *Don’t use any other alumite sealer together.

	Standard Condition	Standard Condition Range		Assumed Problem	Solution
Concentration	40ml/L	30-50ml	Too thin	Sealing performance deterioration	Adding more Sealer
			Too dense	Discoloration of certain dyed colors, Deposition, Powdering and Stains	Dilute with water
ph	5.6±0.2	5.0-6.2	Too acidic	Sealing and Corrosion- resistance performance deterioration	Adjusting pH with ammonia water
			Too alkaline	Liquid getting muddy, Deposition and Powdering	Adjusting pH with diluted acetic acid
Temperature	92 degree C.	80-95 degree C.	Too low	Sealing performance deterioration	Adjust temperature
			Too high	Liquid getting muddy, Deposition, Powdering and Stains
Duration of Time	10 minutes	5-20 minutes	Too short	Sealing performance deterioration	-
			Too long	Efficiency decrease

Features

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1. It is a product that prevents the risk of developing nickel allergy as the product does not contain nickel like other sealing agents containing nickel.
2. Environmental friendly product as no other heavy metals are contained and enables easy waste water treatment.
3. Sealing effects are equivalent to nickel base sealing agents.
4. It can be used under the same conditions as nickel based sealing agents.
5. Treatment with deionized water is recommended, however, similar results can be expected with tap-water as well.

Bath Makeup Procedure

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1. Prepare bath at a ratio of MLS238 SEALER 40ml/L: Deionized water 1L.
2. It is pre-adjusted at approx. pH5.6 when deionized water is used for bath.
   (When using tap-water, the tap water should be adjusted at approx. pH5.6 using diluted acetic acid)
3. When in use, it should be lightly agitated or filtered by circulation, if at all possible.

Bath Control

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Concentration

1. Although high concentration increases corrosion resistance and level of sealing, excessive concentration may increase the risk of discoloration of certain dyed colors, deposition, powdering and stains.
2. The sealing performance deteriorates as the concentration degrades. Replenish proper amount of ML S238 SEALER.

pH

1. If pH becomes lower than 5.0pH, the sealing performance may deteriorate. Add ammonia water to adjust pH.
2. If pH become over 6.2pH, the corrosion resistance and level of sealing is increased. However, as the sealer liquid may get muddy and chance of forming deposits and powdering may increase, add diluted acetic acid to adjust pH.

Temperature

1. In general, corrosion resistance and level of sealing increase at higher temperatures, however the sealer bath becomes muddy and forms deposits and powdering as well as stains.
2. At temperatures below 80°C, the characteristics of the sealing film may be altered and might not be able to get enough sealing performance, which could be the cause of defectiveness.

Time

In general, longer duration of time increases the corrosion resistance and level of sealing. However, the increase ratio becomes slow after 20 minutes.

Others

1. Water-wash before sealing treatment should be done swiftly and thoroughly.
2. After sealing, do not touch the treated surface until it is completely dried.
3. If bath liquid is used continuously for a long time, it becomes muddy and may form deposits being contaminated by pretreatment liquid. The lifetime of bath liquid may be prolonged by filtering and purifying (Do not use activated carbon).
4. The sealing agent should be used within the scope of condition and do not mix.

Analysis method

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1. Sample 50ml of sealer liquid from sealer tank and filter with active carbon.
2. Sample 10ml of the above with a transfer pipette to a 300ml conical flask and add 100ml of deionized water.
3. After adding 2ml of pH10 ammonia-ammonium chloride buffer solution, add a small amount of EBT indicator.
4. Titrate 1/100M EDTA (ethylenediaminetetraacetic acid). The end point is where the color of the liquid turns blue from reddish purple.

Applications

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1. Interior goods, decorative items, etc.
2. Products emphasizing base material patterns.
3. Electronic parts, clocks, camera parts.

Package

20Liter Plastic Container