Display checkmark &#x2713 in tcpdf

Question

I'm using TCPDFs writeHTML to convert some html-code into a pdf. This works fine so far except that the checkmark (&#x2713) is converted into a questionmark instead of... well, a checkmark ;-) The PDF is created as UTF-8, but neither feeding the checkmark itself nor the hex-representation resulted in showing the correct checkmark. I tried to used the fonts Helvetica and Times, shipped with TCPDF, but both only display ?. Any idea how to get the checkmark into the PDF?

Answer 1

@Nuno answer was a huge help. For those wondering, the writeHTML equivalent (as asked by OP) is :

<span style="font-family:zapfdingbats;">3</span>