Hi there. I don't know if you know that the triangle chalk is made by the masters chalk co.
Once upon a time I emailed them and asked about two things. The difference in Triangle chalk and Masters chalk, and ... the difference in pre flag and post flag Masters chalk.
Below is a cut and paste of the return email I received.. BTW I prefer Triangle. It seems a bit grittier and seems to grind itself into the leather better. JMHO
Here he answers the Flag question first ....
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I wish I had a nickel for every time I answered this question. The simple answer is there is NO difference. It's just a label and has nothing what-so-ever to do with the chalk. The reason for the flag is two fold. First, following 9/11 we as an American Company felt it was our way of showing our pride for the United States to place the flag on our chalk which goes all over the world. Second, our chalk is counterfeited quite a bit and in an attempt to stay a step ahead of the counterfeiters we randomly use the flag and non-flag label every day. This means that it is purely chance as to which piece of chalk gets a flag label and which piece gets a non-flag label. Again this is just a label and has nothing at all to do with the composition of the chalk.
To answer your second question, Master chalk was developed for the pool player while Triangle was developed for the billiard/snooker player. Triangle has a harder consistency then Master.
I hope I've answered all your questions. Please feel free to ask me anything else that you desire.
Sincerely,
Tweeten Fibre Co., Inc.
Skip Nemecek,
President
(312) 733-7878 Phone
(312) 733-0767 Fax