"Eastern Star Chinese Curry Powder"
This still doesn't sit well with me, not saying its not a real practice in ifindforu's Welsh takeaway.
But I've got experience of over 50 BIRs here in the NE and I've never seen it happen. Another point is, as a rule Bengali's don't really like the Chinese very much at all,
or their cuisine. Well at least the ones I talk to. So I don't really think they would bother with their curry powder.
In my experience the main "curry powder" used in a Bengali restaurant "Mixed Powder" has
always been 'Madras Curry Powder" which is a historic spice blend of at least 12 spices, originally dating back to the 1800's
(Some people get confused with Madras Curry Powder, as its nothing to do with heat or Madras the Curry!)
A Typical Bengali Mixed Powder =
2 tsp Madras Curry Powder
2 tsp Turmeric Powder
1 tsp Coriander Powder
1 tsp Cumin Powder
1 tsp Paprika
0.5 tsp Garam Masala
Switching out Madras Curry Powder for Chinese Curry Powder, may be a fun experiment and give your home curry a twist,
but I doubt it would help you achieve an authentic Bengali Restaurant flavour,
As for Eastern Star, its probably a great Chinese Curry Powder and it will after all, have a blend of familiar Asian spices in it.
But there must be loads of other brands on the market.
I noticed, even in Aldi, they had there own branded (Pantry Essentials) Chinese Curry Powder,
can't remember the price, but probably cheap and packed in 250g packets.
Anyhoo have fun experimenting.
cheers Chewy