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Ecafez

WHY DIFFERENCE IN COLOUR IS MEASURED AS dE?

1 Answer
0 Expert

WHY DIFFERENCE IN COLOUR IS MEASURED AS dE?

Shreya

Delta-E (dE) is a single number that represents the 'distance' between two colors. The idea is that a dE of 1.0 is the smallest color difference the human eye can see. So any dE less than 1.0 is imperceptible (as in turn the lights off and head to the pub) and it stands to reason that any dE greater than 1.0 is noticeable (as in put the coffee on, we're going to be here a while). Unfortunately - and probably not surprisingly - it's not that simple. Some color differences greater than 1 are perfectly acceptable, maybe even unnoticeable. Also, the same dE color difference between two yellows and two blues may not look like the same difference to the eye and there are other places where it can fall down. Details can be read on link - http://www.colorwiki.com/wiki/Delta_E:_The_Color_Difference

Shreya Bhaduri | 3 weeks ago

Ecafez

Is UV coating effective?

3 Answer
0 Expert

Is UV coating effective?

Shreya

Yes it is effective, but UV cured powders are not readily available in India. UV is successful on flat jobs only and not on jobs like tables, chairs or automotive components or frames because of the distance between the UV source light and the job has to remain same. Then only will the curing happen. There cannot be any shadow areas where the UV light is not reaching, the curing will not happen then. Otherwise it is effective. We use UV coating for the jobs which we cannot heat i.e. on plastics or wood.

Shreya Bhaduri | 3 weeks ago

Shreya

Yes it is effective, but UV cured powders are not readily available in India. UV is successful on flat jobs only and not on jobs like tables, chairs or automotive components or frames because of the distance between the UV source light and the job has to remain same. Then only will the curing happen. There cannot be any shadow areas where the UV light is not reaching, the curing will not happen then. Otherwise it is effective. We use UV coating for the jobs which we cannot heat i.e. on plastics or wood.

Shreya Bhaduri | 3 weeks ago

Shreya

Yes it is effective, but UV cured powders are not readily available in India. UV is successful on flat jobs only and not on jobs like tables, chairs or automotive components or frames because of the distance between the UV source light and the job has to remain same. Then only will the curing happen. There cannot be any shadow areas where the UV light is not reaching, the curing will not happen then. Otherwise it is effective. We use UV coating for the jobs which we cannot heat i.e. on plastics or wood.

Shreya Bhaduri | 3 weeks ago

Apurva

What is the mixing ratio of virgin powder to used powder?

2 Answer
0 Expert

What is the mixing ratio of virgin powder to used powder?

Ecafez

80:20 with the virgin being 80% and used/recycled powder being 20% in case of glossy, structured texture

Sudipta Bag | 3 weeks ago

Shreya

Usually it is 80:20 with the virgin being 80% and used/recycled powder being 20% in case of glossy, structured texture. But in certain cases like matt black or satin black we can go up to 30% for recycled/used powder because there is hardly any gloss difference seen.

Shreya Bhaduri | 3 weeks ago

Apurva

Is de-rusting process required for online process where there are no chances of rust in parts?

1 Answer
0 Expert

Is de-rusting process required for online process where there are no chances of rust in parts?

Bandana

No, in fact you should avoid that. There you can go for offline de-rusting if few of your parts are having problems. These chemicals are available with chemical suppliers.

Bandana Singh | 3 weeks ago

Apurva

We do not have blasting or power tools. We are using 3 in 1 chemical. Is it okay to use 3 in 1 chemical ...

1 Answer
0 Expert

We do not have blasting or power tools. We are using 3 in 1 chemical. Is it okay to use 3 in 1 chemical before priming?

Bandana

In case of high-end corrosion resistance only the cross hatch test is not applicable, we have to do one more test which is the adhesion pull-off test, where we check the hydraulic force. The 3 in 1 will not give the right pull-off test.

Bandana Singh | 3 weeks ago

Atif

Is there any method to reduce the MIG weld bead or it is operator skill?

1 Answer
0 Expert

Is there any method to reduce the MIG weld bead or it is operator skill?

Shreya

Do you mean to improve the weld bead? It depends on lack of skill and knowledge of welders & welding procedure setting (management skill & knowledge). Train them for a shorter period of time (2/3 days).

Shreya Bhaduri | 3 weeks ago

Atif

Does arc length vary with the thickness of substrate or mechanical properties?

1 Answer
0 Expert

Does arc length vary with the thickness of substrate or mechanical properties?

Apurva

Yes it varies in any Manual Welding that’s why the range. Quality of welding effects on the Arc Length hence the mechanical properties. Arc Length is one of the four essentials in Arc welding which needs a great amount of skill to perform.

Apurva Chanda | 3 weeks ago

Bandana

Most of the processes are defined by the OEM Customers, in such cases, customers normally do not allow ...

1 Answer
0 Expert

Most of the processes are defined by the OEM Customers, in such cases, customers normally do not allow change in the processes, and how can one address such problems?

Atif

Here it is not about changing the process, it is about improving the operations. The wrong operations must be identified and rectified. The OEM can also be involved as a member of the team if required.

Atif Ali | 3 weeks ago

Bandana

What is the difference between continuous and continual improvement?

1 Answer
0 Expert

What is the difference between continuous and continual improvement?

Atif

Continuous improvement is like a steady slope of improvement while continual improvement is like a step by step improvement programme, which moves on after one stage of improvement has been stabilised.

Atif Ali | 3 weeks ago

Shreya

What is a customer loyalty program?

1 Answer
0 Expert

What is a customer loyalty program?

Ecafez
Ecafez
Ecafez
Saivi

It's a relationship building exercise

Saivi | 3 months ago

Shreya

Is salt spray testing appropriate for powder coating and paints?

0 Answer
0 Expert

Is salt spray testing appropriate for powder coating and paints?

Ecafez
Romy

What should be the weld time for MIG welding and spot welding?

1 Answer
0 Expert

What should be the weld time for MIG welding and spot welding?

Shreya

There are three possible answers: 1) GMAW process is used for a Fusion Joint where as Spot Welding is a Non Fusion joint. Hence, time of welding cannot be compared 2) Time depends up on Type and Nature of Joints. Whereas GMAW process is usually applied on plates, Spot Welding is restricted for thin sheets. 3) If GMAW process is applied on thin sheets, in that case, time required shall be more than Spot Welding for a specified length. It also depends on no. of spots to be welded for that particular length. In both the cases,the joints have to be Lap Joint. Practically, all the data are required and mode of metal transfer in GMAW process is required to be known to calculate the welding time. Thank you for giving us a chance to serve you.

Shreya Bhaduri | 3 months ago

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