A: Hi Lucy,
Thank you for contacting Printerbase.
Although the iP8750 will produce great quality photos it won't support card stock upto 300gsm. It states only photo paper upto 300gsm. Therefore if you are printing card stock we would recommend one of the Prixma Pro machines. One of the most popular machines we sell is the Canon Pixma Pro 100s - https://www.printerbase.co.uk/canon-pixma-pro-100s-a3-colour-inkjet-printer.html
This is also the cheapest one we have which will support 300gsm card stock.
Please do let me know if you require any further information.